Humans have synced their calendars to the sun and moon for centuries, but every so often, these systems need a little correction.
Stopping someone against their will can be false imprisonment or even kidnapping. There are laws that determine who is acting as a hero and who is acting as a vigilante.
Inhaling air is how you get the oxygen your body needs to turn your food into energy. Other living things use different strategies.
Turns out ‘A’ didn’t have to be the first letter in the alphabet, nor ‘Z’ the last.
Lots of factors can influence your music taste, from your age and where you’re from to the personality traits you have.
Your immune system is often able to fend off pathogens it’s never seen before. But defending your body against all of them all at once is a tough challenge.
There are so many fish in the ocean that if you took them out, important habitats and food sources for many creatures would be lost.
Pictures of black holes have a white outline around them when photographed, due to one of black holes’ unique and key features.
Two dental experts explain that these furthest-back molars may be a not-so-necessary leftover from early human evolution.
Sound needs matter to propagate, so the vast vacuum of space is not just empty − it’s silent.
No matter your age, if you’re being bullied − there’s help out there.
There are a lot of myths about crystals − for example, that they are magical rocks with healing powers. An earth scientist explains some of their amazing true science.
Scientists are trying to figure out if time travel is even theoretically possible. If it is, it looks like it would take a whole lot more knowledge and resources than humans have now to do it.
Slimy snot is an important part of how your immune system wards off germs and fights back from infection.
Ghosts can be spooky fun, but there’s no evidence they exist.
Up to 50% of US teens feel they are addicted to their devices. But help is out there.
An astronomer explains why space looks so dark despite containing 200 billion trillion stars.
Balancing well is a whole-body experience that develops over time and takes practice to master.
Measuring the ages of planets and stars is tricky. An observational astrophysicist describes the subtle clues that provide good estimates for how old different space objects are.
An aerospace engineer explains why it’s so hard to tell just how fast an airplane is really moving.