In the desert, the absence of water means little or no chemical weathering can take place. Instead, erosion, frost, sedimentation, and the huge temperature fluctuations between day and night break down the rocky surface into sand or gravel.
We all know we need iron to live. How else would our blood carry oxygen to our lungs? And cells need iron in order to multiply. The problem is that our cells aren’t the only ones who need iron in order to thrive. Cancer cells and microorganisms like E. Coli and staph need iron too.
For some people, the word "worm" means "money".
What do IQ tests really measure? Find out what psychologists think, on this Moment of Science.
How is it that sometimes people survive multiple lightening strikes, while others die instantly?
Have you ever wondered why dressing makes lettuce wilt so quickly?
But did you know that it causes cancer in cats? If you smoke and have a cat, then your cat smokes second-hand.
Researchers who study jellyfish were delighted when a whole bunch of them turned up in Wisconsin. They were found in a sandstone quarry.
For the most part fat is stored in the fat cells that compose fatty tissue. Think of a fat cell as a tiny plastic bag filled with a drop of fat. Interestingly, fat cells do not multiply.
Since botulism bacteria cannot survive in oxygen, they form spores that lie dormant until they’re in an oxygen-free environment. For example, the oxygen-free insides of canned goods are prime breeding grounds for botulism.
This Moment of Science will answer a question that must have been gnawing at you since you first noticed that human males have nipples.
The ultraviolet light is supposed to attract mosquitoes against an electrified grid, which then zaps them. Well, it’s true that plenty of mosquitoes are attracted into your backyard by the light, but once the mosquitoes catch a whiff of you, they ignore the light completely.
The relationships between plants and insects are often intricate and complex. One such relationship is that between the yucca plant and the yucca moth.
A few things happen as you swallow. The back section of the roof of your mouth, also called the soft pallet, closes off the nasal passages so that food doesn’t go up into the nose.
On this Moment of Science, learn how statisticians figure the odds.
Ever wonder how night vision goggles work? Seeing in the Dark, on today's Moment of Science.
Though they make it look easy, skateboarders spend a tremendous amount of time practicing when it comes to perfecting the ollie.
Today’s Moment of Science unravels the parts of metabolism. But first, what is metabolism really? Statements like “he can eat a lot because he has a fast metabolism” are somewhat misleading. Metabolism isn’t about the digestion of food in your stomach; it’s the name given to all of the chemical changes that occur in an […]
In the last few years, a scourge from the Middle East has posed a biological threat to North American well-being–mosquitoes carrying the West Nile virus.
Interestingly, in a study of over eight thousand people between the ages of fifteen and fifty-four, more “anxious attachment” was found in young people than older people.
Although ants usually communicate through smell, they also use sound to send distress calls and warnings about danger. Since they don’t have ears, scientists believe that they sense sound vibrations in their knees.
Honeybees make propolis by collecting the secretions of trees and other plants where they live; thus the make-up of propolis varies depending on the plant life around. Researchers have found the propolis of Brazilian honeybees to be particularly potent when it comes to protecting teeth.
When you first happen upon that special someone, you start to feel romantic, passionate, giddy and euphoric. These feelings aren’t purely psychological. If we were to take a blood sample, we’d discover high levels of certain chemicals in your blood.
The back of your eye, called the retina, has two kinds of cells: rods and cones. In bright light the cones are what we use, while in dim light the cones are less active and the rods take over.
Killer whales communicate in a variety of dialects. There are discernible differences, however, between the chatter of killer whales that eat only fish and those that eat both fish and seals.
The Leatherback turtle is special because of its ability, unlike other sea turtles, to survive in cold waters.
The hope is that as the fly walks across the surface, its little body charges up, allowing poisonous spores to stick to its body like metal shavings to a magnet. If this happens, then soon enough, the fly will walk no more.
You may not realize it now, but current computers are going to be obsolete in a few years. Find out how on this Moment of Science.
Pacemakers are electrical devices that monitor the heart rate and helps get it up to speed when it starts pumping too slowly. The small battery powered disk is inserted just beneath the skin above the heart. A couple of attached wires monitor the heart and carry signals and impulses to and from the heart.