When should you stop looking and start leaping? It's a question we face all the time, in situations from dating to hiring, trading to parking. Luckily, maths has an answer for us!

I love finding ways to be smarter with time, and that got me thinking about scheduling. What's the most efficient way to plan your day, given all of the variables?

100 years ago, there were only 4 countries in the world where you could expect to live past 50. Today, you can expect to live past 50 in every country in the world.