Safari Live - Day 42 | National Geographic

First of all, you know, I guess I should apologize. I haven’t been back on the tube in weeks because I’ve been crazy busy shooting season 12 of Shark Tank in itself, which is an extraordinary feat. I gotta do a big shout out to the cast and crew on this b…

In this video, we’re going to talk about sources of genetic variation, which is key for evolution and natural selection to happen. Just as a little bit of a primer: natural selection, you can have a bunch of different organisms with different genetics, di…

Friends make life good. They provide the scaffolding that makes it not just bearable, but fun. They give us a sense of meaning and purpose and are a source of security, self-esteem, and happiness. Almost nothing predicts how happy you will be as how conne…

We’ve talked about things that might drive inequality, things that Thomas Piketty refers to as forces of divergence. But now, let’s think about, or at least some of what he cites as forces of convergence. So, forces of convergence are things that might ma…

Let’s give ourselves some intuition and then some practice adding negative numbers. So, let’s start with negative 11 plus negative 3. So, first we can visualize what negative 11 looks like on a number line. Like this, I intentionally have not marked off …

Cheetah are in a race for survival. There are maybe just 7,000 adult cheetah left in the wild. I’ve covered the illegal trafficking networks draining the Horn of Africa of their cheetah. They also face massive habitat loss and retaliatory killings by herd…