David Benaron Profile Banner
David Benaron Profile
David Benaron

@SpottiCat

2,419
Followers
33
Following
474
Media
1,263
Statuses

Storyteller, MD, c-suite exec, innovator. Then: invented wearable greenlight heartsensor, bioluminescent scans. Now: Healthcare w/out walls, hacking Longevity.

Portola Valley, CA
Joined April 2011
Don't wanna be here? Send us removal request.
@SpottiCat
David Benaron
3 months
Onstage giving lecture at UC Berkeley yesterday (pic by on bsky)
Tweet media one
27
237
2K
@SpottiCat
David Benaron
2 years
When I invented the green light heartrate tracker, just 1 person had one. In 2014, when I was Chief Medical Officer of the 1st fitness wearable company, I wrote "within 5โ€“10 years, a billion peopleโ€™s bodies will be continuously monitored every day." In 2023, we'll pass 1 billion.
Tweet media one
21
105
2K
@SpottiCat
David Benaron
2 months
I like this viewpoint
@DrJankenstein
Dr Jankenstein
2 months
@felpix_ @SpottiCat That is not a fur suit, that is a fur*tuxedo*.
0
1
75
2
3
181
@SpottiCat
David Benaron
2 months
Jabari the Serval sniffing the morning breeze just now
3
4
141
@SpottiCat
David Benaron
1 month
Watch a wellness wearable measure pulse+oxygen. The vet was creative, thrilled it works. But it's exactly how I designed orig sensor to work! Light goes in and comes back. The sensor doesn't even need to touch. Lip, cheek, tongue work, even thru endoscope (vid @jungle_doctor , IG)
2
22
139
@SpottiCat
David Benaron
3 months
Probably original plate owner (plates this color were from about 1971), spotted in Portola Valley CA, right near Stanford and Xerox PARC.
Tweet media one
2
4
75
@SpottiCat
David Benaron
3 months
I'm going to be giving a furry STEM lecture at UC Berkeley on "Furries, neurodivergence, and STEM: Finding Your Path from Zero to One to One Billion," Friday Apr 26, 2024. Here is the talk poster. Thanks to the Furries at Berkeley for the invite.
Tweet media one
1
1
73
@SpottiCat
David Benaron
2 months
Full UC Berkeley invited talk I gave: "Furries, Neurodivergence, & STEM." I talk about growing up different, being a fur, & how being living openly gave me superpowers that drove success. Turn captions on! Filmed/captioned by @BerkeleyFurries (40min+Q&A).
Tweet media one
3
6
70
@SpottiCat
David Benaron
4 years
The mouse turns 50 today, patent issuing to Douglas Englebart in November 1970 (via @doctorow and Fipi Lele)
@doctorow
AFK Cory Doctorow NONCONSENSUAL BLUE TICK
4 years
Nov 17, 1970 h/t Fipi Lele
Tweet media one
3
6
39
0
30
70
@SpottiCat
David Benaron
1 year
A key current difference between the writing of a human author and ChatGPT is this: the first draft from the human includes an original idea, just badly expressed; the first output of ChatGPT is an unoriginal idea, but competently expressed (via @doctorow and Chiang)
@doctorow
AFK Cory Doctorow NONCONSENSUAL BLUE TICK
1 year
Chiang points out a key difference between the output of ChatGPT and human authors: a human author's first draft is often an original idea, badly expressed, while the best ChatGPT can hope for is a competently expressed, unoriginal idea. 35/
4
52
280
0
14
54
@SpottiCat
David Benaron
4 years
The Taino were a Caribbean people when Columbus arrived. Some words survive: Hurricane comes from hurakรกn, Taino god of storms. The people were thought extinct. Now, genetics shows 6-14% of Caribbean DNA is Taino. Science untangles our origins and history.
1
25
48
@SpottiCat
David Benaron
2 years
My journal at moment the wearable heart rate sensor was invented. I built a system to measure light reflecting off skin. Here's the color spectrum of first ever pulse-change from blue (400) to infrared (1000). The peak? 570nm, or green light. The best wavelength to use was green!
Tweet media one
1
7
39
@SpottiCat
David Benaron
3 months
World's oldest conjoined twins passed away. I knew them as doctor in training at Children's Hosp of Philadelphia. Then, they were Lori & Dori. George's gender transition made Lori & George the 1st conjoined same-sex twins to identify as different genders.
0
2
36
@SpottiCat
David Benaron
2 years
"Your smartwatch heart rate monitor was developed by a furry" -- article about my development of the smart watch heart rate sensor, in @PCMag for pride month.
2
11
34
@SpottiCat
David Benaron
2 months
2
0
33
@SpottiCat
David Benaron
3 months
Protest governments and policies, but don't hate the people. Whether a race, ethnicity, religion, the people are never of one mind. In Palestinian and Israel, people have suffered horribly, things no human should suffer. Hold governments responsible for crimes, but stop the hate.
0
1
31
@SpottiCat
David Benaron
3 months
My @OuraRing warned me of a high skin temp and resting heart rate. At the time, I felt fine except for a slight cough after a sore throat. Later that day, I developed a sinus infection, requiring antibiotics. Markers of inflammation from wearables can predict infection by 12-48h.
Tweet media one
0
1
27
@SpottiCat
David Benaron
1 year
"From zero to 1 billion" -- Video of talk I gave last weekend accepting a lifetime achievement physics award. If you're curious where the green light heartrate sensor or fitness wearables came from, or what I do, watch this 20 min video Link:
Tweet media one
0
2
24
@SpottiCat
David Benaron
3 months
Stable solutions to the 3-body problem exist in math, but in the real world these impossibly balanced systems fail quickly.
@Rainmaker1973
Massimo
3 months
In 1890, Henri Poincarรฉ proved the non-existence of the uniform first integral of a three-body problem and the sensitive dependence to initial conditions of its trajectories. Yet, stable solutions to it do exist.
120
2K
10K
1
0
23
@SpottiCat
David Benaron
2 years
@secprentice There were many steps. The combination of medicine, biophysics led me to do post-doctoral work in a lab that studied physiology and spectroscopy, so my work was directed toward inventing new sensors. Then Stanford recruited me as a prof to do it there.
2
0
22
@SpottiCat
David Benaron
2 months
Video of a single photon bouncing off a mirror. Images were collected at fixed time points, repeated to accumulate each frame from 20 to 300 picoseconds after photon release. From: Single-photon sensitive light-in-fight imaging. Nat Commun 6, 6021 (2015).
0
0
21
@SpottiCat
David Benaron
2 months
California already overproduces power from renewables by up to 175% of need, so it is adding batteries such that excess daytime power is stored then re-released at night. Article: Images:
Tweet media one
Tweet media two
0
3
21
@SpottiCat
David Benaron
6 months
@TristanSnell "From your mouth to god's ear" my grandmother would have said.
4
0
18
@SpottiCat
David Benaron
3 months
First cameraphone-shared pic, in: 100 Photos That Changed the World, taken Jun 11, 1997, Santa Cruz, CA, by P Kahn & sent to 2,000 contacts. (Image below captured from print copy of 100 Photos given to me by Khan's friend, Founder of Jawbone, the 1st fitness wearable company).
Tweet media one
1
0
17
@SpottiCat
David Benaron
4 months
Purring serval, kneading bread. Jabari the Serval, right now.
0
1
16
@SpottiCat
David Benaron
2 years
Here's an example of how science can be used to mislead people. The first statement is Fact, 100% true. The second statement is bat-poop crazy false. It's very easy though, by reading the fact first, for your brain to think both statements are true, by association.
Tweet media one
2
3
16
@SpottiCat
David Benaron
2 years
View from Artemis I mission... These look like artist's concept pieces from a 1970s magazine, but it's REAL (from NASA)
Tweet media one
2
0
14
@SpottiCat
David Benaron
2 years
How light interacts with tissue was the focus of my lab at Stanford Medical School. But from invention to commercialization of the wearable heart rate sensor took 8 years. The company expanded its sensors, and was acquired in merger with first wearables company, Jawbone, in 2014.
Tweet media one
1
1
14
@SpottiCat
David Benaron
3 months
@almormd 2017 Portland eclipse, in Cheetah fursuit
Tweet media one
Tweet media two
1
0
14
@SpottiCat
David Benaron
2 months
Mt. Diablo, 60mi/100km away, seen from the Santa Cruz Mountains, across the blue of the San Francisco Bay, shrouded by clouds and shot on iPhone from my bedroom in the rising sunlight this morning.
Tweet media one
0
0
11
@SpottiCat
David Benaron
2 years
Finally, COVID-19 deaths falling below rates at the initial outbreak.
@EricTopol
Eric Topol
2 years
Something to celebrate. The lowest Covid death rate in over 2 years @OurWorldInData
Tweet media one
163
1K
7K
0
1
11
@SpottiCat
David Benaron
2 months
I've done some big things, but also failed more times than i can count. Exploring new areas means epic fails as well as epic wins. For some, failure's a badge of shame. For me, it's a "tax"... the universe's tax on being me. It's just a cost of doing business at the edge.
1
0
10
@SpottiCat
David Benaron
3 months
13 years on X #MyXAnniversary
Tweet media one
0
0
10
@SpottiCat
David Benaron
6 years
"What the internet is for" -- CL @doctorow in @locusmag deconstructs what's revolutionary (computers) from what is not (teh net). I disagree -- a distributed, self-organizing, near-instant info system IS revolutionary -- but his summary is compelling.
0
5
8
@SpottiCat
David Benaron
6 months
Jabari the Serval likes pillows, rn resting his head and pawbs.
Tweet media one
0
0
10
@SpottiCat
David Benaron
2 years
Here's a wrist-based continuous blood alcohol sensor that measures every 20 sec. As wearable sensors get more mainstream and vital signs (including pulse ox, glucose) are routinely measured, there's a number of interesting sensors that will come out (sensor and app by @BACtrack ).
Tweet media one
2
0
8
@SpottiCat
David Benaron
1 year
How to find me at Comic-Con #sdcc
Tweet media one
Tweet media two
0
2
9
@SpottiCat
David Benaron
2 years
Sunset in our town at the summit of Santa Cruz Mountains today, above the western ridge of the San Andreas Fault. These hills make for great mountain biking. Taken by a Portola Valley, Calif. resident.
Tweet media one
1
2
9
@SpottiCat
David Benaron
10 months
@Benioff The influx for dreamforce is such a sizable percentage of the baseline population. It just shows how well the City can work when it works well.
3
0
9
@SpottiCat
David Benaron
2 years
Pounce! Our rescue wildcat Jabari the Serval captures a toy.
1
0
8
@SpottiCat
David Benaron
2 months
Tweet media one
0
0
8
@SpottiCat
David Benaron
2 years
Was traveling with friends, and one wanted to charge their @OuraRing . "No problem! Use my charger," I said. Oops! Each ring is sized to fit, so their ring didn't fit my charger. Obvious in retrospect, but it didn't occur to me: different ring sizes means different charger sizes.
Tweet media one
1
1
8
@SpottiCat
David Benaron
9 months
One of the "Trolls," in Issaquah, Washington. 6m/20ft high, they are the work of Danish artist Thomas Dambo using recycled wood to create the large sculptures he leaves around the world. This one was completed Sept 3, 2023 There are 100 worldwide. Shown with my partner for
Tweet media one
2
0
8
@SpottiCat
David Benaron
1 year
Honored to receive a lifetime achievement award in optical physics.
3
2
7
@SpottiCat
David Benaron
2 years
The probe that the first green-light heart rate sensor used was hand-made. It used optical fibers and tiny prisms in epoxy to bring light of any wavelength to the skin, and take it back to a measuring device. Electronics wouldn't allow us to put everything into a watch, at first.
Tweet media one
0
0
7
@SpottiCat
David Benaron
2 years
@shultquist That's great to hear.
0
0
2
@SpottiCat
David Benaron
2 years
Jabari the Serval is a bit pouncey tonight after tug of war did *not* seem to tire him out
1
1
7
@SpottiCat
David Benaron
2 years
I'm an avid reader, mostly digital media but a few old-fashioned paper products still arrive by snail mail. The titles certify this is a geeky household. I mean really, @WIRED and @PhysicsToday , with a Hubble coffeetable book underneath?!?
Tweet media one
0
0
7
@SpottiCat
David Benaron
4 months
This is small piece of history -- a piece of the chain link fence that surrounded the original Woodstock festival, made into a pendant, given to my family years ago It has a dated certificate from the artist and the team that did the fencing at the concert.
Tweet media one
0
0
6
@SpottiCat
David Benaron
4 months
This year is the 20th anniversary of taking my first start-up public. Picking the XGEN symbol, then watching it show up on the ticker stream was wild. And, the symbol was a hidden pun on Gen-X, so that was a win too. We made genes glow and changed cancer research.
Tweet media one
0
0
6
@SpottiCat
David Benaron
5 months
Jabari the Serval likes my new jeans, and wants them marked as belonging to him.
0
0
7
@SpottiCat
David Benaron
2 months
"1-hour delivery from Space" -- There's all sorts of issues with this, not the least of which are "why?!?" and that the energy required is an unavoidable and steep cost, in the absence of a space elevator. Still, one of the boldest pitches I've seen.
Tweet media one
2
0
6
@SpottiCat
David Benaron
2 years
Today I turn 2 billion seconds old (at 9:43 am Pacific DST). I calculated this date when I was in my twenties, then updated it recently just to be sure. You can calculate your 1 billion second birthday here or here . #GeekStreetCred
Tweet media one
2
0
6
@SpottiCat
David Benaron
2 years
Probably my coolest invention was a operating room camera (pic A) that could track a fluorescent dye, administered as an injection, as it accumulated in the body (pic B), and see it in room light in tumors ("T" in pic C).
Tweet media one
0
1
6
@SpottiCat
David Benaron
2 years
California met 100% of it's daytime electrical needs thru renewables yesterday, a huge milestone. Over 24h, percentage averages 65%, but batteries will push day and night to 100%. Natural gas remains used for heating, but can be displaced by 2045.
1
1
7
@SpottiCat
David Benaron
2 years
@JonoH We just tested the next generation of this in the UAE. It's a great place to work.
1
0
7
@SpottiCat
David Benaron
2 years
@secprentice Everything grows on the shoulders of things before you. Fingertip pulse oximeters existed, and pulses had even been seen in red light shined through toes in the 1940s. But conventional wisdom said no green light penetrates skin, so no one tried reflected light from skin before us
1
0
6
@SpottiCat
David Benaron
2 years
@TheCodeLorax 1. At the simplest, when your heart beats, your blood pressure rises. This causes your blood vessels to stretch and fill, changing the color of your skin. Red blood reflects red and absorbs green light. A computer can see and time these green light changes to find your heart rate
2
0
6
@SpottiCat
David Benaron
2 years
It's more important to workout often than workout longer. This helps trigger the genes that reverse the effects of aging. I aim to get moderate to vigorous exercise every day, but do a structured workout (HIIT, strenuous hike, elliptical) at least every other day.
Tweet media one
1
1
6
@SpottiCat
David Benaron
3 months
A.I. sees patterns that we miss because it encompasses associations in much larger datasets than our brains can hold. Here's a paper that suggests pancreatic cancer, often found late, can be seen much earlier from signs in our medical records.
0
0
6
@SpottiCat
David Benaron
2 years
The best description of writing an academic paper I have seen (via Eric Daza)
@Dr_Meming
Dr Meming
2 years
Academic writing: reading ten papers just to write a single sentence. @OpenAcademics @AcademicChatter #AcademicTwitter
Tweet media one
54
1K
8K
0
0
6
@SpottiCat
David Benaron
1 month
"Normal is an imaginary lasso thrown around you by others. Once you realize it's not there, the world is yours." -- Stephan Pastis, Pearls Before Swine @stephanpastis (via @Zarafagiraffe ).
Tweet media one
0
0
5
@SpottiCat
David Benaron
2 years
Found a Google Easter egg! I was searching for DART, the NASA probe crashed into an asteroid's moonlet to change moon's orbit a few days ago. In Goog search's results, a probe flies across results and bumps the search page, repositioning it. Search: "nasa dart probe". Vid: below
0
0
4
@SpottiCat
David Benaron
2 years
A really productive creative day for me starts with no meetings before 11am. That let's me finish & write down ideas i noodled on last eve and dreamt about during night. Also, I get a 1h workout. 8am meetings drive all productive thoughts away, and I struggle all day to catch up.
0
1
5
@SpottiCat
David Benaron
2 months
Exactly why I mourn Twitter: "Twitter was what made it possible for us to get together. [Its sale] broke our home,โ€ and [led to] the deterioration of a platform that had once allowed square pegs to find one another and to thrive." -- @AkivaMCohen , atty, in @NYtimes
1
1
4
@SpottiCat
David Benaron
6 years
This is a pyrocumulus cloud -- a cloud caused by fires so large and hot that they create their own weather. As California burns, many fear extreme fire due to climate change is the new normal. Article:
Tweet media one
1
6
3
@SpottiCat
David Benaron
1 month
"Calls for revenge, retribution and violence littered the rightwing internet as soon as Trumpโ€™s verdict. Some posted online explicitly saying it was time for hangings, executions, civil war." -- Guardian. The US Right has only us-vs-them policy positions.
0
0
4
@SpottiCat
David Benaron
10 years
New stop sign markings in our neighborhood #YouHadOneJob http://t.co/CvJgkt5gSz
Tweet media one
4
4
5
@SpottiCat
David Benaron
2 months
"If cement was a country, it would be the third biggest source of [CO2] emissions after China and the US, responsible for 7.5% of human-made CO2." -- BBC, CO2 release comes from many sources. Cement production makes 1/14 of all CO2 released
0
0
4
@SpottiCat
David Benaron
2 months
A newly discovered but now-buried Nile branch could explain why 31 Egyptian pyramids were built in a chain along a now-inhospitable desert strip of the Nile valley 3,700 to 4,700 yrs ago. The Nile branch may have floated rafts or ships there!
0
0
3
@SpottiCat
David Benaron
1 year
One of the keys to Longevity is to get a high energy consumption rate at least once a day. For me, this is hitting moderate to intense exercise daily. It doesn't need to be more than a few minutes to work. Here's Zone 5 intensity this AM for 5 mins using #AppleWatch .
Tweet media one
2
0
5
@SpottiCat
David Benaron
1 year
Slow-motion 1-hand pushups... My bodyweight workout starts with 120 push-ups, 80 of them are 1-handed, in alternating sets of 20. By using my body weight, I can do this anywhere, even when traveling.
0
0
5
@SpottiCat
David Benaron
2 years
Jabari the Serval wants food.
0
1
5
@SpottiCat
David Benaron
2 years
A colorful sunrise, seen from my bedroom, looking east toward the San Francisco Bay.
Tweet media one
1
0
5
@SpottiCat
David Benaron
3 months
Two satellites travelling at tens of thousands of miles an hour just missed each other by 30ft/10m in February. It would have produced millions of pieces of space junk, leading to more collisions before the debris could be catalogued and tracked.
0
0
3
@SpottiCat
David Benaron
2 years
Awesome quad suit #Link cosplay and pic, from Thoron Wild Creations and Michael Thornber Photography on Facebook.
Tweet media one
0
0
4
@SpottiCat
David Benaron
2 years
@TheCodeLorax 3. There were optical physics labs in London, Philadelphia, Stanford, Boston. But the origins of the method dates to shining light through toes in the 1940s and pulse oximetry in the early 1980s. If you want to explore the literature, search "PPG" and "Heart Rate."
0
0
4
@SpottiCat
David Benaron
4 months
3 "street" drugs received breakthru status from US FDA: LSD for anxiety, MDMA for PTSD, and psilocybin for mood/depression.
1
0
4
@SpottiCat
David Benaron
2 months
2
0
4
@SpottiCat
David Benaron
5 months
A mountain lion patrols a Portola Valley, Calif town trail Fri eve. There's two lions in our town, 1,000 in the Santa Cruz Mtns where our town is located, and 4,500 in all California. Roads are breaking up and reducing the population ()
1
0
3
@SpottiCat
David Benaron
2 years
@J4k3_j213 Good question. When your heart beats, your blood pressure rises. This causes your blood vessels to stretch and fill, changing the color of your skin. Red blood reflects red and absorbs green light. A computer can see and time these green light changes to find your heart rate.
0
0
4
@SpottiCat
David Benaron
2 years
Jabari the Serval sunning himself in the front catio this morning. He has access to the outdoor wire cages 24/7. This one has a level paver floor, the other larger one is on a sloped hillside.
Tweet media one
0
1
4
@SpottiCat
David Benaron
9 days
For decades i subscribed to news, believing a free press yields an educated populace, a bedrock of Democracy. As @WSJ went far-right, I left 10 yrs ago. Now, as @nytimes shows acquiescence to fascist propaganda, asking only the non-felon to step down, I am so done with them too.
Tweet media one
1
0
4
@SpottiCat
David Benaron
2 years
Jabari the Serval sitting where he looks out at the forest this morning.
Tweet media one
0
0
4
@SpottiCat
David Benaron
2 months
@bikerglen Or perhaps Noop, from the days you just erased a line rather than reenter all the assembly code on the PDP 8 front panel.
1
0
4
@SpottiCat
David Benaron
2 years
Marched in tiger suit in the 52nd Annual San Francisco Pride parade in tiger, just behind SF Ballet and Opera. About 1,700,000 people attended SF Pride this year, with about 250,000 parade spectators.
Tweet media one
1
0
3
@SpottiCat
David Benaron
2 years
Doing workout, Day 8 of COVID-19, out of viral jail soon!
Tweet media one
1
0
4
@SpottiCat
David Benaron
1 year
Me wearing Heuler Wolf at Comic-Con 2017, in story in Wisconsin State Journal (photo by @chrispizzello / Invision / @AP ; fursuit reference and suit by @ShanziBeast at @clckwrkcreature ). Full article here: )
Tweet media one
1
0
4
@SpottiCat
David Benaron
3 months
Gram-negative bacteria have been particularly difficult to treat, and some show resistance to all previous antibiotic classes. No new antibiotic drug classes have emerged since the 90s. The paper reports a new class of drugs.
1
0
4
@SpottiCat
David Benaron
2 years
@TheCodeLorax 2. The science behind making it work was complex and fascinating. At the time, people were spending years modeling how photons were scattered and absorbed in living tissue, including skin. Entire PhDs were granted for this.
1
0
4
@SpottiCat
David Benaron
2 years
New words I learned this week: -- "Bird app" -- Twitter -- "Proons" -- Protogens -- "Cryptocurrency exchange offering innovative products including industry-first derivatives, options, volatility products and leveraged tokens" -- Bankruptcy. See also: Enron.
0
0
4
@SpottiCat
David Benaron
2 years
@Abadesi Off the top of my head: Marissa Mayer, Meg Whitman, Anne Wojcicki, Carly Fiorina, Mary Barra. I'm sure there's more. But for sure the list is way too short.
1
0
4
@SpottiCat
David Benaron
2 months
@JuniIsABear From time to time, when the invitations come.
0
0
4
@SpottiCat
David Benaron
2 years
@DavidSacks True! When i started my first successful company, i was a graduate medical student at Stanford. Student debt, 1 child, no cash. Today, past IPO and M&A, annual revenues of that company exceeed $1 billion. Wouldn't have happened without VCs.
0
0
4
@SpottiCat
David Benaron
2 years
Tweet media one
0
0
4
@SpottiCat
David Benaron
2 months
@GASpriggs They said "wear your best suit..."
0
0
3
@SpottiCat
David Benaron
5 months
But what about the early worm? From a decade ago by Stephen Pastis, Pearls Before Swine.
Tweet media one
0
0
2