The curious minds at What If transport us to the Paleozoic Era and envision what life would be like in this ancient period.

The growth of vast forests removed significant amounts of carbon dioxide, resulting in atmospheric oxygen levels potentially ...

A Soviet-era spacecraft meant to land on Venus in the 1970s is expected to soon plunge uncontrolled back to Earth.It's too early to know where the half-ton mass of metal might come down or how ...

Part of a spacecraft that launched in 1972 and has been orbiting Earth for 53 years is due to reenter Earth’s atmosphere in the next two weeks and could crash to the ground intact, scientists say.

A Soviet-era spacecraft meant to land on Venus in the 1970s is expected to soon plunge uncontrolled back to Earth FILE - This photo provided by researcher Jane Greaves shows the planet Venus ...

CAPE CANAVERAL, Fla. (AP) — A Soviet-era spacecraft meant to land on Venus in the 1970s is expected to soon plunge uncontrolled back to Earth. It’s too early to know where the half-ton mass of ...

CAPE CANAVERAL, Fla. (AP) — A Soviet-era spacecraft meant to land on Venus in the 1970s is expected to soon plunge uncontrolled back to Earth. It’s too early to know where the half-ton mass of metal ...