YR4 has a 2% chance of hitting Earth in 2032. Astronomers are tracking it to refine estimates of its size and orbit to see how much of a risk the space rock poses.
It measures 130 to 300 feet across, a pebble compared to the asteroid that killed the dinosaurs, which is estimated to have been six to nine miles in length. On the other hand, on Feb. 15, 2013, an ...
Humans evolved late in Earth history. While this timing inspired the conclusion that humanlike life is a cosmic improbability ...
Humanity may not be extraordinary but rather the natural evolutionary outcome for our planet and likely others, according to ...
Roughly 300,000 years ago, our species first appeared on the African landscape before spreading globally and coming to ...
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