Jon Krakauer

When I was 23, I climbed this mountain in Alaska called Devil's Thumb alone. It was incredibly dangerous, and I did it because I thought that if I did something that hard and pulled it off, my life was gonna be transformed. And of course, nothing happened. But I get the search for purpose.

'Skyline' is an alien invasion film that really takes an interesting look at the genre. The writers did an amazing job of creating a new take at how life from other planets come and plan to invade Earth.

The genus Drosophila is one of the great success stories. There's hundreds of species within the genus. They're on every continent except Antarctica, they're in tropical rain forests, they're in deserts, they've evolved many exotic mating behaviors, and they're capable of incredibly long-distance flights.

I want to tell mayors, county chiefs and heads of big companies: don't just chase GDP growth; don't chase the biggest profits at the expense of our children and grandchildren and at the cost of sacrificing our ecological environment.