Three things to know:

Time is an invention. And a fairly recent one.Vanessa Ogle tells us why – and when – we became slaves to the clock.

Water could be the new oil.NASA’s Jay Famiglietti explains the myriad ways we’re mismanaging our water – and why that could lead to conflict.

There's a way to beat the roulette wheel. Two ways, in fact. Take a peek into the world of some very smart gamblers.