Having explored the Mariana Trench, the summit of Everest, and the edge of space, Victor Vescovo knows what awe feels like in its most dramatic forms. What surprised him most was how often that same feeling appears in everyday life.

“While society's been humming along and enjoying all these advances in agriculture and medicine, in the last 50 or 60 years, ecologists have learned a lot about how nature works. I've codified these into a set of rules called the 'Serengeti Rules.'”

What astronaut Ron Garan saw in space changed his life forever – here’s what it taught him.

The next time you see your dog sniffing the pavement or another dog’s junk, you should let them. Here’s why.