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Whether big or small, if you see something that people need, you can start a company. Tony Anderson/Stone via Getty Images

How do you start your own company?

There are five basic things to address while starting your own company: Need, idea, product, setup and market.
Sneezing with your eyes closed is a reflex you can consciously override. Robert Kneschke/EyeEm via Getty Images

A pediatric nurse explains the science of sneezing

People sneeze for many reasons and in many ways. One of them is to protect your airways from irritants and infectious disease.
It can stretch your mind to ponder what’s really out there. Stijn Dijkstra/EyeEm via Getty Images

Does outer space end – or go on forever?

Astronomers know a lot about what's in outer space – and think it's possible it never ends.
A behavior from kittenhood persists in many adult cats. Byron Chin/flickr

Why do cats knead with their paws?

According to a veterinarian, the behavior some people call 'kneading the dough' or 'making biscuits' is a clue your cat feels comfortable around you.
Poisonous or edible? Ekaterina Morozova/iStock via Getty Images Plus

Why are some mushrooms poisonous?

Poison can be a deadly defense that helps a mushroom make sure its spores are spread to new places to grow into baby mushrooms.
Fire a set of high-power lasers at a tiny speck of hydrogen isotopes and you can initiate nuclear fusion, the process that powers the Sun. National Ignition Facility

How much energy can people create at one time without losing control?

Scientists are working on ways to make lots of energy by converting matter into energy. The trick is keeping the process under control. One possibility is nuclear fusion – the Sun's power source.
The need for shut-eye is universal. Justin Lewis/Stone via Getty Images

How much sleep do you really need?

Getting a good night's sleep on a regular basis can help you do well in school or at work. It might even make you better-looking.

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