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Dr Robin George Andrews 🌋☄️ Profile picture
@SquigglyVolcano
Aug 20, 2019 • 4 tweets • 2 min read • Read on X
What’s weirder than a Himalayan lake packed with hundreds of skeletons? How about one that contains bony corpses separated by a thousand years of time?

Best of all? No-one knows how these people perished or why they were there. My latest, for @NYTScience. nytimes.com/2019/08/20/sci…
Featuring the stellar work of Éadaoin Harney, David Reich and Niraj Rai, as well as great extra commentary from @JenniferRaff and @CatJarman!
Ah, found you, @EadaoinSays!
Now appearing in The @Independent ! :) independent.co.uk/news/world/asi…

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More from @SquigglyVolcano

Dr Robin George Andrews 🌋☄️ Profile picture
May 19, 2024
Hey everyone! Did you see any of the amazing footage of that fireball over Spain and Portugal this morning? Wondering what it was?

Here’s a little thread for your Sunday reading.
Asteroid (rock and metal hunks of would-be worlds) hit Earth all the time, but some of them (a meter and bigger) are large enough to burn up quite furiously in the atmosphere. All that compressed, heated gas is great at cracking these open explosively.
Asteroid fragments move at ~17km/s, and even though they are often small, they carry with them a huge amount of kinetic energy which all gets dumped into the atmosphere when they explode in an air bursts.

Boom! Fireball. Awesome.
Read 13 tweets
Dr Robin George Andrews 🌋☄️ Profile picture
Mar 29, 2024
☄️It’s true! NASA’s OSIRIS-REx mission has brought back 121 grams of ancient matter from an asteroid named Bennu. It cost of $1.2 billion. But what it can tell us about the dawn of the solar system, and the creation of life itself, is priceless.

A 🧵on the key findings so far:
So far, the team have looked at maybe 1% of the sample. But already, huge clues as to the journey Bennu has been on for the past 4.6 billion years have come to light, and were recently presented at the LPSC gathering in Texas.
One key query: what made the solar system? Bennu contains matter that was forged *before the Sun existed*, which means it preserves a record of the stars that died to seed the solar system. Isn’t that bonkers?

So what have they found in the sample so far?
Read 16 tweets
Dr Robin George Andrews 🌋☄️ Profile picture
Jul 10, 2023
Okay: here’s everything you need to know about the new eruption in Iceland, including what is certain, what is uncertain, and all that jazz.

(I’ve got a few weeks of book leave left, but couldn’t leave y’all hanging.)

THREAD

🧵🌋

credit: @Vedurstofan
Today’s eruption is the third in a brand-new cycle that began in 2021.

These eruptions are happening in Iceland’s west, on the sparsely populated Reykjanes Peninsula.nationalgeographic.com/science/articl…
For 800 years, no eruption had happened on land here—but then, in late-2019, very early-2020, a plethora of quakes began to shake the peninsula.

This built up to a cacophonous crescendo in February 2021, including those violent enough to aggravate Grindavík on the coast.
Read 27 tweets
Dr Robin George Andrews 🌋☄️ Profile picture
Mar 9, 2023
THE VALENTINE’S DAY ASTEROID SCARE

Here’s everything you need to know about asteroid 2023 DW, in one thread.

#2023DW Image
I’m literally writing the book on planetary defense, so I know things about errant space rocks. And asteroid 2023 DW – with its small-but-not-zero chance of hitting Earth on Feb 14, 2046 is making headlines.

So: let's sort a few things out, shall we?
Asteroids get discovered all the time, somewhat “near” to Earth.

2023 DW was first spotted on February 26th of this year by an optical observatory in Chile’s Atacama Desert. They saw it as glint of light far from home. neo.ssa.esa.int/search-for-ast…
Read 25 tweets
Dr Robin George Andrews 🌋☄️ Profile picture
Feb 27, 2023
This new preliminary report, but Turkish scientists, gives a detailed analysis on why the Turkish quakes of Feb 6 were so lethal. Sure, the quakes were powerful; they literally tore up the ground. But that’s not the part that really got my attention… temblor.net/temblor/prelim…
It’s the part on building damage.

They noticed that in the quakes, buildings were either only lightly damaged or were so severely damaged that many collapsed. Why would this be?

Turns out that many buildings either had quake-resistant features or designs, or they did not.
If they were up to code and we’re quake-resistant, then they mostly were just lightly damaged. If not, they probably collapsed. Only 7% of buildings fell into the “medium damage” category.
Read 10 tweets
Dr Robin George Andrews 🌋☄️ Profile picture
Dec 20, 2022
BREAKING: NASA’s pioneering InSight lander — Mars’s first fully-fledged robot geophysicist, one that provided the first internal map of another planet’s geologic innards — may have lost power and died.
Per a NASA update: “On Dec. 18, 2022, NASA’s InSight did not respond to communications from Earth. The lander’s power has been declining for months, as expected, and it’s assumed InSight may have reached its end of operations.”
“It’s unknown what prompted the change in its energy; the last time the mission contacted the spacecraft was on Dec. 15, 2022.

The mission will continue to try and contact InSight.” blogs.nasa.gov/insight/2022/1…
Read 15 tweets

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