In 1519, Ferdinand Magellan set sail on a greuling and dangerous quest: the first-ever voyage around the world. But since that first daring adventure, advances in sailing technology and navigation ...

Draw a straight line between A and B on a globe. Draw a straight line between the same A and B on a flat map. (In both cases, “straight line” means the shortest distance between those points). Will ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. How far do you think you'd be able to travel across Earth's oceans before running into land, if ...