Earth's core cannot be made just of iron — it also appears to contain carbon. And our research suggests it may contain a bit of oxygen and possibly silicon as well. When you purchase through links on ...

Earth's rotation is randomly speeding up, and nobody is quite sure why. These speedups, which have occurred several times over the last few years, haven't had any effect on daily life, but they also ...

If NASA must pull back, Europe is ready to step up — and do so with open arms. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. As climate ...