On this week's episode: big bird intelligence, astronauts should jump, sheep and human history, and a tiny great ape.

Saturn’s moon Mimas, known for its uncanny resemblance to the Star Wars Death Star ... But thanks to a gravitational quirk, the outer solar system can be quite balmy. Consider Jupiter and ...

There are several sci-fi film franchises out there, but the underrated movie Moon should have spawned a series of its own.