Why don't hurricanes cross the equator?

Hurricanes do not cross the equator because of the Coriolis effect, which is a force caused by the Earth's rotation. This effect causes storms in the Northern Hemisphere to rotate counterclockwise and storms in the Southern Hemisphere to rotate clockwise. As hurricanes approach the equator, the Coriolis effect weakens and eventually becomes too weak to sustain the storm's rotation, preventing it from crossing the equator.