Ultrasound uses high frequency sound waves to create pictures of what is going on in our body.
It seems to be possible for planets in a stable solar system to somehow get off track and run into each other. Is our planet in danger?
Female aphids don't need males to reproduce. Their trick is called "parthenogenesis" and means big savings in time and energy.
Bugs flip when they die because their legs return to what is called the "position of flexion."
One of the fundamental ideas of scientific thinking can be summed up in the phrase: "Correlation does not imply causation." That can be very confusing.
Ants have been practicing agriculture for millions of years. Actually they can can milk certain insects like a farmer milking a cow.
Many bird-of-paradise species have evolved colorful plumage - a result of special eating habits and behaviors.
The electroencephalograph, or EEG, helps doctors to take at look at our brain activities. But don't worry - the machine cannot read your mind, yet!
There's nothing more artificial than artificial flowers, right? But what about natural, artificial flowers?
Earthworms swallow soil, extract nutrients from it, then excrete the rest up onto the surface.
Dolphins have evolved to live in an aquatic environment, and like bats, they can use sonar to locate prey by emitting different frequencies of sounds.
Scientists think there are a number of reasons why young animals leave home. By doing so, they avoid competing with their relatives for resources.
Of course, most of the technology on Star Trek doesn't exist for real. But at least one cool bit of Star Trek science has been made real.
Imagine being cooped up for months inside a space capsule or station with other astronauts, constantly checking equipment to make sure everything works.
No matter HOW fast the "fast" ball is moving, it will still fall at the same speed as the ball that just meanders over the edge.
Five basic criteria are used to determine if a species is threatened or endangered.
Grooming reduces tension by lowering the heart rate and releasing endorphins that are calming.
As soon as they lay their eggs, the female cichlids scoop them up into their mouths and incubate them until they hatch.
The reason it's smarter to store your eggs with the fat end up is that the egg itself does not completely fill the interior of the shell.
When many spiders capture a fly, they don't eat it right away. Instead, they poison the fly and wrap it in silk.
Before about 360 million years ago, no vertebrates had limbs. They all shared the same fish-like body shape. But around that time something exciting happened.