Some species use their ears not just for hearing, but for communicating as well.
Measuring movement is pretty tricky. Scientists are developing radar sensors that attach to people's shoes.
Learn how airplanes use technology to avoid turbulence in the air ahead, and about systems that can help make flying a smoother, and safer, experience.
Beyond our atmosphere flies a lot of debris. Some fragments can be larger than mountains, but most is space-dust.
When the microwaves hit the front of an oncoming car, some of them are reflected back into the radar gun.