New discoveries of objects in the Kuiper Belt have also presented challenges for the Planet Nine theory. The latest is known ...

Sitting by the beach and listening to the tide come in is one of my favorite things to do. But if you stop and think about ...

Engineers at the University of Wisconsin-Madison uncovered a critical flaw in how lunar and Martian rovers are tested on ...

The weak gravitational pull on a particle just half the mass of a grain of sand has been measured for the first time. This most precise measurement of its kind is a breakthrough towards the ...

An international team of physicists discovered the largest-ever merger of 2 black holes through a phenomenon known as gravitational waves.

(via Steve Mould) The cavendish experiment shows that even the very week force of gravity can be seen between two room scale objects. Even with the naked eye.