Physics Unraveled ✓

[video] Projectile motion explained by professor. Walter Lewis. I would have loved to learn like this. This makes visualization very easy.

[image] Dark energy makes up about 68 percent of the universe, and we understand it even less than dark matter. In the late 1990s, astronomers expected the universe's expansion to be slowing down due to gravity. Instead, measurements of distant supernovae showed the expansion is speeding