Oxygen levels in the Earth's atmosphere are likely to have 'fluctuated wildly' one billion years ago, creating conditions that could have accelerated?the development of early animal life, according to ...

The oxygen we need to live makes up about 21% of our atmosphere, but it wasn’t always so. For its first 2⅟₂ billion years, Earth’s atmosphere had no oxygen. Then, with the advent of organisms capable ...

Breathing is a crucial biological function essential for survival and various bodily processes. It occurs involuntarily, ...

It's no secret that Earth is doomed. Sure, there's the threat of climate change and the fact that sea levels are rising around the world. But that's not what we're talking about. Instead, our planet's ...

Europa, one of Jupiter’s Galilean moons, hosts a liquid ocean beneath a frozen shell. Because of its proximity to Jupiter, the moon is constantly hit with radiation that erodes its icy surface, ...