Dinosaur-killing asteroid impact fouled Earth's atmosphere with dust
The total amount of dust, they calculated, was about 2,000 gigatonnes - exceeding 11 times the weight of Mt. Everest.
Sat Nov 11 2023
Ancient Maya city discovered in Mexican jungle
INAH institute said the city, which it has named Ocomtun, was likely an important center more than a thousand years ago.
Sun Jun 25 2023