Every time I see the moon in the sky, it makes me happy. Our natural satellite is so familiar it’s easy to take it for ...

[Artwork by David Aguilar] One trillion years from now, alien astronomers in our galaxy will have a difficult time figuring out how the universe began. They won’t have the evidence that we enjoy today ...

Will humanity extend into the far future? It's likely many of us think it should. The problem is that each of us, individually and collectively, act otherwise—we are destroying the environment and ...