Outer space is full of mysteries. Think about it: According to NASA, there could be as many as 100 billion solar systems in the Milky Way, and hundreds of billions of other galaxies in the universe.

Add Yahoo as a preferred source to see more of our stories on Google. We still don’t know what other life is out there lurking in the universe, which makes inventing your own DIY alien costume a blast ...

Halloween is a week away, and for some, the idea of a DIY costume may be too overwhelming to fathom with so little time. There are hundreds of costume ideas you can pull off, even last minute, for ...