An effort to understand Earth’s past climates uncovered a history of wild temperature shifts and offered a warning on the ...
I f astronomers had been walking the Earth 466 million years ago, they may have had something special to see. The moon and ...
Evidence suggests Earth had a ring system 466 million years ago, causing a surge in meteorite impacts and possibly ...
A ring could explain a mysterious arrangement of impact craters near the equator and might even have caused an ice age, ...
At times during the past half-billion years, carbon dioxide warmed our planet more than previously thought, according to a ...
A new study co-led by the University of Arizona and the Smithsonian offers the most detailed glimpse yet into how Earth's ...
Earth may have had a giant ring of space rocks surrounding it, similar to those around Saturn, which could have led to ...