Watch high-powered gas guns blast space habitat (for science) Sierra Space recently tested new designs to protect astronauts from micrometeoroid strikes. By Andrew Paul.

Get the Popular Science daily newsletter💡 Breakthroughs, discoveries ... Three, one-year-long stints in a Mars habitat simulation are meant to pave the way for the real thing.

A film looking at how water travels through a plant from the roots to the leaves. Suitable for Key Stage 1, Key Stage 2, Early and 1st Level and 2nd level and Foundation level.