Garrett, 10, Md. Dear Garrett, On very clear days, I can see five volcanoes from my campus. They’re Rainier, Hood, Adams, St. Helens and Baker. That’s…a lot. I asked my friend Katie Cooper about it.

Experts are finding the secrets to supporting life in outer space on our own planet – in the deep ocean. Learn why underwater volcanoes and hydrothermal events could help us find the building blocks ...