A researcher claims to have found evidence of humans in Chesapeake Bay over 22,000 years ago. The assertion is yet another ...
Archaeologists debate when the first humans arrived in the Americas. Controversial 22,000-year-old stone tools are one of the ...
Two million years ago, an encounter with a cold cloud of gas and dust could have caused our planet's "protective giant bubble ...
Earth’s weather changes based on where it is in its annual cycle around the Sun – but is it possible the climate can also be ...