Look at your hand, your computer, a wall. Does it seem solid? Actually, it’s 99.99% nothing. Just empty space.
To understand how this can be, you have to understand the structure of atoms, the building blocks of matter. The sites here will help you do that — and show you how people could map out something so small you have to magnify it over 100 million times to see it.
The dark isn’t as dark as it used to be. The skyward glow of artificial lights makes it harder to enjoy a clear view of stars, planets, and galaxies in the night sky. Light pollution also harms living things, both plants and animals.
Discover the affects of light pollution and steps we all can take to reverse it.
What does physics have to do with baseball? More than meets the eye. Physical laws are behind everything from a swing-and-a-miss to a grand slam.
Discover why hitting a baseball is one of the hardest feats in modern sports, the crucial role the windup plays in a pitcher's fastball, and more about the physics of America's favorite pastime.
How many people in your life have died of an infectious disease? Almost anyone answering that question before the 20th century would have said, "many."
Vaccinations, antibiotics, and hygiene have changed our lives. But the microbes are changing too. New diseases are emerging, as old ones evolve to resist the drugs that used to kill them. Take a look at the fight.
Comets are more than brilliant streaks of light in the night sky. These icy objects orbiting the Sun are actually fossils, rocky remnants from the early days of our solar system.
Discover how the comet’s coma and tail are formed and why Sun-grazing comets are important to astrophysics.