BIG QUESTIONS

Periodical cicadas have had scientists scratching their heads for centuries.

Glaciers do the same thing, but on a much larger scale.

Don't let this question leave you … with anxiety.

It may look silly, but they do it to keep us safe.

The maximum soaring height of that lost party favor depends on physics.

Some enterprising students decided to find out.

Scientists say the discomfort of being bored drives us to seek out dopamine-stimulating sweet or fatty foods.

Do they print up jerseys for every possible scenario and send the extras to El Salvador?

The scientific reason behind those peculiar mouth contortions.

As Washington, D.C. residents already know, it's because of an important holiday.

It dates back to the 13th century, and may have been a dirty court game.