Here on planet Earth, the real number is different: 37. The 37th parallel is the latitude line below which people’s skin gets enough sunshine to produce a healthy amount of vitamin D.

If you measure from base to peak, however, Mauna Kea in Hawai'i is the tallest on Earth, measuring over 10,210 meters (33,500 feet), despite peeking out just 4,205 meters (13,796 feet) above sea ...

COLUMBIA, South Carolina — In the cooler months, not is the temperatures dropping, the sun's angle is also changing, especially north of the 37th parallel. The 37th parallel is the circle of ...