Blog

How we discovered the existence of particles 1000 times smaller than bacteria.

How do magnetic fields works? How are they similar to electric fields? How are they different?

The basics of this invisible force generated by electric charge

What's the difference between them?

To understand our ride on the Earth, first take a ride on an airplane

What does it mean to be scientifically literate, and why is it important?

How science validates ideas and debunks baloney

How rocket propulsion works, even in the vacuum of space

This remarkable invention is like a pressure cooker for light, but with some features that produce pencil-like beams of light at particular wavelengths,

The basic principles of the Global Positioning System (GPS)

Why the Earth's tilt gives us seasons

A CT scanner uses a technique called tomography. Here's how it works.

Why is the sky blue above but orange or red around a sunset?

Einstein's shocking discoveries about space and time at high speeds

Why water droplets are spherical and the Earth is fat

And how do we know it exists?

How nature's destructive fury gives us images of the Earth's core

The case for human-caused climate change, in a nutshell

Find out why we glow in the dark, and what this has to do with the planet's temperature

Why high notes can be low and red lights can be green

What can a giant character from a low-budget movie teach us about the horizon?

Most of the time, they don't!

How far can we see?

What is color, and how does the human eye see it?

What do sunrays, train tracks, and shadows of columns have in common?

Why winds circulate around pressure centers

Why people in different parts of the world see different stars

Why the constellations are gradually changing shape

Spinning at 1000 mph?

Why we need seat belts