Author(s): David J. Smith; Steve Adams (Illustrator)

Words and Numbers

Imagine if you could condense all 3.5 billion years of life on Earth into just one hour. If you did, the dinosaurs wouldn't show up until 56 minutes into the hour, and they'd be gone three minutes later. Modern humans (the ones we are related to) would amble into view at the very end of the hour, with just 0.2 seconds to spare.