Why did they form at that time? Astronomers know from observing distant exploding stars that the size of the universe has ...

The question of where atoms comes from requires a lot of physics to be answered completely – and even then, physicists like me only have good guesses to explain how some atoms are formed.

The question of where atoms comes from requires a lot of physics to be answered completely — and even then, physicists only have good guesses to explain how some atoms are formed. What is an atom?

The question of where atoms comes from requires a lot of physics to be answered completely — and even then, physicists only have good guesses to explain how some atoms are formed.

The Alliant Kids Savings Account has just a $5 minimum balance and a $100 minimum to earn the APY. There is a monthly maintenance fee of $5, but account holders can waive it by opting into ...

Hello, curious kids! Do you have a question you’d like an expert to answer? Ask an adult to send your question to . Please tell us your name, age and the city where you live.