0 23 0 BrainHow spontaneous Brain Activity Keeps You Alive • TED-Ed The wheels in your brain are constantly turning,…
0 1k 0 0 MathHow many ways can you arrange a deck of cards? • 2014 • TED-Ed One deck. Fifty-two cards. How many…
1 750 0 0 AstronomyThe death of the universe • TED-Ed The shape, contents and future of the universe…