Learn about gravity, stars, and really big lumps.
Canadian scientists studying water found deep in an underground mine have determined that the water is at least 1.5 billion years old, and maybe much older.
A baby grabs the string of a single helium balloon and floats right out of its baby carriage. Why can't people really float into the air using helium balloons?
What happens to helium balloons in a car when the car stops suddenly?
Superfluid: the unique, interesting, and rare cold liquid.
What makes the sun shine? It's a question we rarely give much thought. However, there is a scientific explanation for this commonplace phenomenon.
Helium balloons fly because they're lighter than air. As you walk through air, it's natural to think of air as weighing nothing, though that is not the case.
Solar winds create a bubble that cover our entire solar system! Scientists call this the sun's heliosphere.
As your car rapidly decelerates, you feel yourself pushed up against the wheel. Why? Learn more on this Moment of Science.
The same thing happens to the air in the car. When the car stops the air keeps moving forward. This results in more air, or higher air pressure, in the front of the passenger compartment.