The strength of Earth’s magnetic field and the amount of oxygen in its atmosphere seem to be correlated—and scientists want ...

The exosphere becomes less dense the further from Earth's surface you get, but there's no ... atmosphere also offers us protection from physical objects from space, too; you only need to look ...

Earth's atmosphere protects the ... s that Venus has no significant seasonal temperature changes. Mars' atmosphere is also mostly composed of carbon dioxide, with traces of nitrogen, argon ...

We have only one example of biology forming in the universe—life on Earth. But what if life can form in other ways? How do you look for alien life when you ... detect signatures of oxygen in a ...

Cosmic dust steadily rains down onto Earth's atmosphere, while the odd kilometer ... that could melt minerals and metals with no crater needed, Kennett continued to explain. The models also ...