Ad blocker interference detected!
Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers
Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.
Because it (or, on a median basis, the band between the Tropics of Cancer and Capricorn rather than just the Equator) is by definition the area of the Earth closest to the Sun at any point in the year. Also, it is where the atmosphere is the thinnest and the ozone layer provides the least protection from solar radiation.