What do you really need?

Our modern lives are so full of convenience that we forget we don't really need all of this stuff to stay alive. Simply put we need Water, Food, Air and a Place to Live. Everything else, biologically speaking, in unnecessary. Let's look at one into water with the Amoeba Sisters.

Oxygen is easily the most critical thing you need (based on how quickly you'd die without it). ASAP Science does an interesting thought experiment on what would happen without oxygen.

Living is space brings these basic elements of life into stark view. It's Okay to be Smart looks at the challenges of living in space.