The great Galileo Galilei (1564-1642) tried to measure the velocity of light by means of lantern signals between mountain tops. Naturally he failed. Light travels about 186,270 miles (more than seven ...

If there’s one thing that Sonic the Hedgehog is known for, it's for being the fastest thing alive, but he’s not the only speedy character around. Among the huge cast of characters that the games, ...