256 reactions · 26 shares | Teachers know best. When equipped with the right tools, they always find ways to support their students. Seeing Khanmigo in action left me more optimistic than ever that AI will empower teachers to do what they do best. | Bill Gates | Facebook

On December 24, 1968, Apollo 8 astronaut Bill Anders captured an image that had never been seen before in human history: the planet Earth rising above the horizon of the moon. Anders and fellow astronauts Frank Borman and James Lovell had traveled nearly a quarter million miles to orbit the moon but, at that moment, unexpectedly found themselves captivated by their home planet. "Here we came to study that moon and yet," remembered Anders, "it was this gorgeous earth rise, this colorful, delicate

2.1M views · 53K reactions | On December 24, 1968, Apollo 8 astronaut...