Italy’s Campi Flegrei is showing some troubling early warning signs, but scientists caution that its eruption is far from certain.
When will an asteroid hit Earth and wipe us out? Not for at least 1,000 years, according to a team of astronomers. Probably.
Either way, you should get to know an asteroid called 7482 (1994 PC1), the only one known whose orbital path will cross that of Earth’s consistently for the next millennium—and thus has the largest probability of a “deep close encounter” with us, specifically in 502 years. Possibly.
Published on a preprint archive and accepted for publication in The Astronomical Journal, the paper states that astronomers have almost found all the kilometer-sized asteroids. There’s a little under 1,000 of them.
Suppose a large inbound asteroid were discovered, and we learned that half of all astronomers gave it at least 10% chance of causing human extinction, just as a similar asteroid exterminated the dinosaurs about 66 million years ago. Since we have such a long history of thinking about this threat and what to do about it, from scientific conferences to Hollywood blockbusters, you might expect humanity to shift into high gear with a deflection mission to steer it in a safer direction.
Sadly, I now feel that we’re living the movie “Don’t look up” for another existential threat: unaligned superintelligence. We may soon have to share our planet with more intelligent “minds” that care less about us than we cared about mammoths. A recent survey showed that half of AI researchers give AI at least 10% chance of causing human extinction. Since we have such a long history of thinking about this threat and what to do about it, from scientific conferences to Hollywood blockbusters, you might expect that humanity would shift into high gear with a mission to steer AI in a safer direction than out-of-control superintelligence. Think again: instead, the most influential responses have been a combination of denial, mockery, and resignation so darkly comical that it’s deserving of an Oscar.
Continue reading “The ‘Don’t Look Up’ Thinking That Could Doom Us With AI” »
Using Zoonomia’s data, researchers have also constructed a phylogenetic tree that estimates when each mammalian species diverged from its ancestors5. This analysis lends support to the hypothesis that mammals had already started evolutionarily diverging before Earth was struck by the asteroid that killed the dinosaurs about 65 million years ago — but that they diverged much more rapidly afterwards.
Only the beginning
The Zoonomia Project is just one of dozens of efforts to sequence animal genomes. Another large effort is the Vertebrate Genomes Project (VGP), which aims to generate genomes for roughly all 71,000 living vertebrate species, which include mammals, reptiles, fish, birds and amphibians. Although the two projects are independent of one another, many researchers are a part of both, says Haussler, who is a trustee of the VGP.
After lightning struck a tree in New Port Richey, Florida, a team of scientists from the University of South Florida (USF) discovered that this strike led to the formation of a new phosphorous material in a rock. This is the first time such a material has been found in solid form on Earth and could represent a member of a new mineral group.
“We have never seen this material occur naturally on Earth – minerals similar to it can be found in meteorites and space, but we’ve never seen this exact material anywhere,” said study lead author Matthew Pasek, a geoscientist at USF.
According to the researchers, high-energy events such as lightning can sometimes cause unique chemical reactions which, in this particular case, have led to the formation of a new material that seems to be transitional between space minerals and minerals found on Earth.
Several asteroids are set to dash past Earth in the coming days, according to a list released by NASA’s Jet Propulsion Laboratory, close encounters that are almost certain to pass harmlessly and come days after the White House announced new plans to defend the planet against threats from space.
Two asteroids, one bus-sized and the other the size of a house, will make relatively close approaches to Earth on Wednesday, according to NASA’s Asteroid Watch Dashboard.
Three more, all approximately airplane-sized, are also set to whizz past Earth on Thursday, the agency said.
Continue reading “4 Large Asteroids Are Whizzing Towards Earth. Here’s What You Need To Know” »
This is a galactic-sized problem. Scientists revealed Tuesday that galaxy PBC J2333.9–2343 has been reclassified after discovering a supermassive black hole that is currently facing our solar system, reports Royal Astronomical Society. Alien-hunting physicist on mission to prove meteorite that hit Earth is extraterrestrial probe Asteroid that could wipe out a city is near.
Read more ❯.
The recent observations prove that not all asteroids are boring objects simply hanging out in space.
Gone are the days when we believed asteroids to be just large rocks hanging out in space. As space exploration has progressed, we have come to note that they are much more complex than that.
A great example of this is the asteroid Didymos, which according to a new study published on Monday, is literally spitting rocks into outer space due to the excessive speeds at which it is spinning.
Continue reading “European Space Agency’s Hera to inspect DART asteroid impact debris” »
Go to https://brilliant.org/IsaacArthur/ to get a 30-day free trial + the first 200 people will get 20% off their annual subscription.
If the end of the world is nigh, it may be too late to avert a catastrophe. So what can we do to mitigate the damage or recover after a cataclysm comes?
Visit our Website: http://www.isaacarthur.net.
Join Nebula: https://go.nebula.tv/isaacarthur.
Support us on Patreon: https://www.patreon.com/IsaacArthur.
Support us on Subscribestar: https://www.subscribestar.com/isaac-arthur.
Facebook Group: https://www.facebook.com/groups/1583992725237264/
Reddit: https://www.reddit.com/r/IsaacArthur/
Twitter: https://twitter.com/Isaac_A_Arthur on Twitter and RT our future content.
SFIA Discord Server: https://discord.gg/53GAShE
A comet that will make a (somewhat) close approach to the Earth in September 2024 is already creating excitement among amateur astronomers. Comets are unpredictable beasts, and a great many have proven disappointing – but C/2023 A3 (Tsuchinshan-ATLAS) has many of the characteristics required to put on the best display for at least a decade.
Comets visit the inner solar system quite frequently, but few can be seen with the naked eye. Most are either regular visitors (short period) that have been slowly losing material on previous approaches to the Sun and don’t have enough left to be very bright. Others never get close enough to Earth to put on a show.
Tsuchinshan-ATLAS passes both those tests. Its orbit is so long it there is debate as to whether it visited the inner solar system 80,000 years ago, or if it never has. At closest approach, it will be 58 million kilometers (36 million miles) or just under 0.39 AU (Earth-Sun distance) from the Earth.
