05 December 2014, 08:48 PM ET
Magnetic resonance imaging (MRI) uses powerful magnets to realign a body's atoms, which creates a magnetic field that a scanner uses to create a detailed image of the body.
05 December 2014, 08:09 PM ET
Removing a tick correctly can lessen the chance of contracting a tick-borne illness.
04 December 2014, 06:15 PM ET
Type I diabetes is a disease where the pancreas stops producing insulin, a hormone that signals the body's cells to absorb glucose from the bloodstream and convert it into energy.
04 December 2014, 06:04 PM ET
Plate tectonics is the theory that Earth's outer shell is divided into several plates that glide over the mantle.
02 December 2014, 09:39 PM ET
El Niño is a climate cycle in the Pacific Ocean with a global impact on weather patterns.
02 December 2014, 08:30 PM ET
Here's how to engineer a mosquito-free environment, and what to do if these annoying insects do bite.
01 December 2014, 10:20 PM ET
Corn snakes are nonvenomous snakes found primarily in the southeastern United States. They are popular as pets, and selective breeding has produced many varieties, or morphs.
26 November 2014, 11:44 PM ET
They're the largest cat species that regularly climbs trees.
25 November 2014, 05:05 PM ET
The 650 muscles in the human body control movement and help to maintain posture, circulate blood and move substances throughout the body.
24 November 2014, 08:52 PM ET
Properties, sources and uses of the element sulfur.
24 November 2014, 08:36 PM ET
Their fur may be white, but their skin is black.
21 November 2014, 10:50 PM ET
The cottonmouth snake, also know as water moccasin, is North America's only poisonous water snake.
21 November 2014, 09:22 PM ET
They use those tusks to haul out on the ice!
21 November 2014, 03:39 AM ET
Spirulina, a supplement made from blue-green algae, is touted as a "superfood." It is highly nutritious, but there is not enough evidence to determine if Spirulina is effective for treating any health conditions.
20 November 2014, 09:50 PM ET
Orcas, or killer whales, are the largest of the dolphin family.
20 November 2014, 09:40 PM ET
The endocrine system is a collection of glands that secrete hormones.
20 November 2014, 09:12 PM ET
A urinary tract infection is an infection of any part of the urinary tract, which includes the bladder, kidneys, ureters and urethra.
19 November 2014, 08:26 PM ET
The Brazilian wandering spider is one of the most venomous spiders on Earth.
19 November 2014, 08:49 AM ET
Copperhead snakes are common in North America, and have the distinction of biting more people in the United States than any other snake.
18 November 2014, 11:26 AM ET
Koalas are an Australian icon that have a keen sense of smell, eat mainly eucalyptus leaves and have fingerprints like humans!
15 November 2014, 02:01 AM ET
Mermaids — legendary half-human, half marine creatures — have fascinated people for centuries and inspired many "sightings."
14 November 2014, 06:32 PM ET
These solitary spiders like to hide in dark places in the house. Their bite is very venomous.
13 November 2014, 11:00 PM ET
Moose are the largest members of the deer family. Their antlers get shed every winter, and new ones grow back in spring.
13 November 2014, 10:56 PM ET
Most bug bites and stings are usually just uncomfortable. However, some people are allergic to the venom of certain insects or spiders and can have severe, even life-threatening reactions.
12 November 2014, 08:29 PM ET
These ocean-dwelling mammals evolved from ancestors that lived on land!
11 November 2014, 10:17 PM ET
Huntsman spiders are long-legged predators that hunt down their prey. One species of huntsman spider has a leg span of 12 inches — or as big as a dinner plate.
11 November 2014, 10:10 PM ET
Droughts are one of the most damaging types of weather-related phenomena, but classifying them is difficult.
04 November 2014, 10:56 PM ET
History, properties and uses of the element boron.
04 November 2014, 08:46 PM ET
There are 40,000 types of spiders in the world. All of them bite, but spider bites are rarely deadly.
04 November 2014, 07:33 PM ET
400,000 Americans have MS
03 November 2014, 08:26 PM ET
Ovarian cancer occurs when cells in one or both ovaries proliferate out of control.
01 November 2014, 02:47 AM ET
The strong nuclear force is one of the four fundamental forces in nature. It is responsible for binding together the fundamental particles of matter to form larger particles.