When I was a child growing up in Maine, one of my favorite things to do was to look for sand dollars on the seashores of Maine, because my parents told me it would bring me luck. But you know, these shells, they're hard to find. They're covered in sand. They're difficult to see.

Archaeology holds all the keys to understanding who we are and where we come from.

It's absolutely critical, you know, to train young men and women not just to find sites, but also to protect sites, especially in the wake of the Arab Spring. There's been significant site-looting in Egypt and elsewhere across the Middle East.

WorldView-3 goes into the mid-infrared wavelength, allowing you to see very subtle geological differences on the sites at a 0.4-metre resolution.

I tried to minimize exposure to technology before two. After that, I've taught the kids to use devices in moderation. It's important for them to learn how to control their behaviour themselves. Simply restricting access makes them want it more.

I think there's a lot of crazy stuff on the Internet. You read stuff that is wild speculation, and there's an element of it that makes me not trust it because there's this undercurrent of insanity to it sometimes.

In order to thrive in the 21st century, you have to be a savvy citizen of the digital economy or risk being left behind.

If the Internet, ubiquitous as it now is, proves too dangerous in the hands of the psychologically fragile, perhaps access to it ought to be restricted. We ban drunks from driving because they're a danger to others. Isn't it time we did the same to trolls?