Mark Zuckerberg on Taking Risks and Finding Talented People
And just to make this point, how far into Facebook did it actually become a company? Um, I don’t know. I think probably it
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View AllA message from Sal on school closures and remote learning on Khan Academy.
Hi everyone, Sal here from Khan Academy. I am back in the walk-in closet where Khan Academy all began, socially distanced, obviously.
The entire globe is going through a very unusual crisis right now, and as part of that crisis, you know people are worri…
Jamestown - life and labor in the Chesapeake
When last we left our English colonists at Jamestown, things were finally starting to go their way. Lord Delaware had successfully led English forces in their war of extinction against the nearby Algonquin Tribe, the Powhatans. John Rolfe had discovered t…
The Largest Black Hole in the Universe - Size Comparison
The largest things in the universe are black holes. In contrast to things like planets or stars, they have no physical size limit and can literally grow endlessly. Although, in reality, specific things need to happen to create different kinds of black hol…
Dostoevsky - Never Lie to Yourself
In The Brothers Karamazov, Fyodor Dostoevsky wrote, “Above all, don’t lie to yourself. The man who lies to himself and listens to his own lie comes to a point that he cannot distinguish the truth within him, or around him, and so loses all respect for him…
The Nature of Nature | National Geographic
[Music] Too few can feel. I am the sea and the sea is me. Growing up in Catalonia in the 1970s, every Sunday I would sit in front of la caja tonta, the dumb box, watching my hero, Jack Cousteau. [Music] The exotic places, the daring underwater explorers, …
Photosynthesis | Energy and matter in biological systems | High school biology | Khan Academy
Hey everybody! Dr. Sammy here, your friendly neighborhood entomologist.
Today, we’re going to talk about photosynthesis. There’s very little life on this planet that could exist without photosynthesis. It is the prerequisite for pretty much everything yo…