Gravity is a force that exists everywhere. It pulls all things with mass or energy toward one another. We commonly experience gravity by being pulled downwards by the Earth. Gravity keeps all of ...

The rest of the universe appears to be made of a mysterious, invisible substance called dark matter (25 percent) and a force that repels gravity known as dark energy (70 percent). Scientists have ...

Kids pay attention to the world around them ... There is indeed a force pulling down on these massive balloons. This gravitational force is proportional to the mass of the object.