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 ...

An Ohio mom's handmade crochet Halloween costumes are proving popular with fans of the spooky holiday season. The National Retail Federation estimates Americans will spend around $10.6 billion ...