Many people on our planet right now despair; they think we've reached a point where we've discovered most of the things. I'm going tell you right now: Please don't despair.

The world can now maintain an acute infection in a way that is unprecedented in the history of life on our planet.

If an alien visited Earth, they would take some note of humans, but probably spend most of their time trying to understand the dominant form of life on our planet - microorganisms like bacteria and viruses.

We may have charted all the continents on the planet, and we may have discovered all the mammals, but that doesn't mean that there's nothing left to explore on Earth.

Phone networks can capture life on our planet.

Poverty and lack of education are ruining our planet.