These are the five key unanswered questions that could help archaeologists finally solve the mystery of Stonehenge.

The western edge of Michigan’s Upper Peninsula hides a colossal secret that makes your average roadside attraction look like a carnival prize participation trophy.

Meanwhile, at the winter solstice, the Northern Hemisphere is leaning away from the sun — leading to the shortest day and longest night of the year.

The summer solstice is here. What to know about the longest day of the year Friday is the longest day of the year north of the equator, where the solstice marks the start of astronomical summer.

This solstice falls between June 20 and 22. Meanwhile, at the winter solstice, the Northern Hemisphere is leaning away from the sun — leading to the shortest day and longest night of the year.

For those north of the equator, the summer solstice marks the longest day and the shortest night of the year.

For those north of the equator, the summer solstice marks the longest day and the shortest night of the year.