White sharks and tuna travel for thousands of miles before returning to the same hot spot just as salmon do when they return to the same stream. These journeys are the marine equivalent of wildebeest migrations that take place on the Serengeti plain in Africa.

Sharks are being driven to extinction because people want to eat their fins and their flesh.

I remember being in strong physics, physiology and biology classes.

I think becoming a scientist is the product of parents who gave me enormous opportunities to master nature.

For me, social media isn't just about connecting with friends and sharing photos; it's a bigger, more tangled web that's led me to jobs working in television, speaking gigs around the country, and it's even helped me land my first book deal!

Just remember, in 1973, we had no digital cameras, no personal computers, no Internet. The thought of putting a billion transistors in a cell phone was ludicrous.

Data is what powers all of us and our lives. It is ubiquitous among our now-connected lives. I love how it is now the oxygen of our Internet world.

I believe we should be investing in the potential of nuclear technology based on thorium, to end the use of plutonium and lead to much safer nuclear power plants, less toxic nuclear waste, and less opportunities for nuclear weapons proliferation.