Safari Live - Day 42 | National Geographic

[Music] To the ancient Romans, the planet Mars was symbolic of blood and war. But to many people today, the red planet may hold the key for a bright new future for humanity. [Music] The story of Mars began about 4.5 billion years ago when gas and dust swi…

Oh my God, it is a blue ringed octopus! See those beautiful blue circles? Those aren’t to make it look pretty; that’s warning coloration. Believe it or not, this tiny little creature is one of the most venomous marine animals in the entire world. The blue…

For someone who lives outside of the United Kingdom, the terms United Kingdom and Great Britain and England often feel interchangeable, and they feel like they’re referring to the same thing. But as we’ll see in this video, they aren’t referring to exactl…

These iconic monuments are just shouting, screaming at us: power, dominance, control. I feel about this; I feel so insignificant. Together, these pyramids and the Sphinx and the temples create a landscape of [Music] power. The huge sculpture protects the …

Hello and welcome to Ed Talks with Khan Academy, where we talk education with a variety of experts in the field. Today, I am excited to talk to my own teammate Dr. Adam Green about new content that we have just released on Khan Academy for the start of th…

J. Robert Oppenheimer might be the most important physicist to have ever lived. He never won a Nobel Prize, but he changed the world more than most Nobel Prize winners. Under his leadership, the best physicists of the 20th century built the atomic bomb, f…