Human beings have a conflicted relationship with the sun. People love sunshine, but then get hot. Sweat gets in your eyes.

The sun is so incomprehensibly big that it's almost pointless to bother trying to imagine its size. Our star is about 860,000 miles across. It's so big that 1.3 million Earths could fit inside it.

NASCAR is partnering with Regeneron to educate people on the two most common forms of advanced non-melanoma skin cancer.

When Earth arrives at the point in its orbit where the North Pole is as its maximum tilt (approximately 23.5 degrees from the celestial equator) toward the sun, it results in the longest day and ...

When Earth arrives at the point in its orbit where the North Pole is as its maximum tilt (approximately 23.5 degrees from the celestial equator) toward the sun, it results in the longest day and ...