Baobabs look like trees from another world, or perhaps our planet from another time entirely. They come in a handful of forms ...

This object's mass is just 0.19 percent that of the Sun; to be a star and fuse hydrogen, it ought to be at least 8 percent, ...

There is a supermassive black hole at the center of every galaxy, but they are not cosmic plugholes, waiting for everything ...

The Milne Fiord epishelf lake was an especially interesting example. Located on northern Ellesmere Island, Cana da's ...

The president had vowed to scrap the limits on how much pollution companies running power plants are allowed to release into the air.