Joined November 2018
Photos and videos
HARV 外人 retweeted
math teacher Marc Degen demonstrating the physics of surfing on his desk, 1970
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HARV 外人 retweeted
🚨: Voyager 1 is now so far from Earth that a signal traveling at the speed of light takes 23 hours, 32 minutes and 35.444 seconds to reach it — so when engineers send a command, they can wait nearly two days to know whether the spacecraft responded.
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HARV 外人 retweeted
The Wedge got nutty today and might be even gnarlier tomorrow. Who says it never gets heavy in Southern California? Photos from Grant Ellis.
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HARV 外人 retweeted
Professor Eric Laithwaite shows what happens when a very heavy wheel (20 kg) is spun up to 2,500 rpm.
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HARV 外人 retweeted
"We are like butterflies who flutter for a day and think it's forever." - Carl Sagan, in Cosmos (1980)
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R.I.P. ROB BASE 😢

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HARV 外人 retweeted
May 22
Watch Starship's twelfth flight test x.com/i/broadcasts/1pKkOykQR…

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Órale vato!
✨🇨🇳BYD's vehicle can run smoothly even with three wheels, completely revolutionizing off-road cars.
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HARV 外人 retweeted
Meteor Crater in Arizona, USA was formed 50,000 years ago by a 160 ft meteorite.
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HARV 外人 retweeted
In 1916 someone dug a well to find water for irrigation, in the middle of a desert. Scalding water exceeding 200°F, has flowed ever since. Calcium carbonate deposits building up into this cone shape with colourful thermophilic algae. This is the Fly Geyser.
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HARV 外人 retweeted
Sad news today
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HARV 外人 retweeted
These two giant turtles have been fighting each other for more than 120 years. According to the zoo, one turtle stole the other’s food 120 years ago, and since that day they became enemies. There hasn’t been a single day where they don’t fight for 2–3 minutes😂
Community note
Taipei Zoo identified these as Sulcata tortoises fighting over territory due to seasonal changes — not a 120-year food grudge. Sulcata tortoises live ~54–75 years in captivity, making a 120-year feud between the same two individuals impossible. taipeitimes.com/News/taiwan/ar… en.wikipedia.org/wiki/African_s…
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