A starry sky with the Milky Way galaxy(thanks to Bernd Nies) Early astronomy The very earliest people, as early as six million years ago, knew much more about the moon and the planets and the stars than most [...]
The bus is heavy, so it's hard to get it moving. Who first wrote about inertia? A law of physics first suggested by the Uzbek scientist Ibn Sina about 1000 AD states that [...]
The ballet dancer Misty Copeland jumps high by pushing off the floor. As with the First and Second Laws of Motion, an Islamic scientist was the first to propose the [...]
How hard will the ball hit the catcher's glove? It depends how big the ball is. how fast the pitcher throws it, and how far away the catcher is. Like [...]
Isaac Newton, mathematician and physicist About 1000 AD, in the Islamic Empire, Ibn Sina came up with the idea that an object moving in a vacuum would just keep moving forever without slowing [...]
Light takes years to reach us from these stars far away in space. When solid objects move through space, they follow certain rules that let us predict how they will act. We call [...]
Gravity is an important cause of acceleration Newton's Second Law of Motion tells us that force equals mass times acceleration. You can try this out for yourself. Here's a website with [...]
Voltaire - a French philosopher Voltaire took ideas about religion, science, and human rights that were just getting started in the 1700s AD, and encouraged new ways of thinking about [...]
