References
07 April 2014, 06:35 PM ET
The Celts were an ancient people who spread across continental Europe, and only recently became associated with the British Isles.
07 April 2014, 05:10 PM ET
A miscarriage is the loss of pregnancy before the 20-week mark in the pregnancy. The medical term for a miscarriage is spontaneous abortion.
07 April 2014, 05:04 PM ET
The pancreas helps regulate blood sugar levels. It is also an important aid in digestion.
04 April 2014, 02:37 AM ET
NATO is an alliance of nations that have pledged to respond collectively to an attack against any other member.
04 April 2014, 02:26 AM ET
Suicide rates have been rising steadily, but awareness of the warning signs can help prevent suicide.
02 April 2014, 04:13 AM ET
Every labor story is different, but there are definitely signs that can let you know if you are in the early stages of labor.
02 April 2014, 02:55 AM ET
Biology is the science of life. Biologists study the structure, function, growth, origin, evolution and distribution of living organisms.
01 April 2014, 03:09 AM ET
The Romani ethnic group, often called Gypsies, have unique customs, spiritual beliefs and cultural traditions.
29 March 2014, 01:33 AM ET
Jane Goodall is a primatologist most known for her long-term study of wild chimpanzees in Tanzania.
28 March 2014, 02:51 AM ET
Archaeology is fundamentally the study of humanity and its past.
27 March 2014, 02:33 AM ET
Did you know that Easter eggs are wonderful materials for fun science projects? Try some of these eggs-periments and find out how interesting your eggs can be!
27 March 2014, 02:28 AM ET
When you think you may be pregnant, it's time to check with a pregnancy test. It's important to understand how they work, how to read the results and which one is the most accurate.
27 March 2014, 02:19 AM ET
Attila was king of the Huns, and a relentless warrior who attacked both the Western and Eastern Roman Empires.
26 March 2014, 02:34 AM ET
Italian culture, steeped in the arts, architecture, music and food, has flourished for centuries. Here is a brief overview of Italian customs and traditions.
26 March 2014, 02:27 AM ET
21 March 2014, 11:21 PM ET
Ever since King Tutankhamun's tomb was discovered, stories circulated that those who dared violate his final resting place faced a terrible curse. It was a useful ruse to scare off grave robbers.
21 March 2014, 08:29 PM ET
Sure, your clock is keeping time — but to what?
20 March 2014, 11:23 PM ET
Brightly colored materials in your kitchen can be used to make natural dyes for Easter eggs.
20 March 2014, 02:35 AM ET
For a woman trying to get pregnant, there are a number of ways to increase the chances and make it more likely that she will conceive a child.
20 March 2014, 02:30 AM ET
There are several things a man can do to increase the chances that he will get a woman pregnant.
19 March 2014, 01:13 AM ET
The steam engine may seem like a relic of the past. But without this game-changing invention, the modern world would be a much different place.
18 March 2014, 12:37 AM ET
Russian culture has a long and rich history, steeped in literature, ballet, painting and classical music. Here is a brief overview of Russian customs & traditions.
15 March 2014, 01:39 AM ET
Sinkholes occur when the ground collapses gradually or suddenly due to dissolving bedrock, sometimes taking homes or cars with it.
15 March 2014, 01:12 AM ET
A urinary tract infection is an infection of any part of the urinary tract, which includes the bladder, kidneys, ureters and urethra.
13 March 2014, 01:16 AM ET
Garter snakes are some of the most widespread snakes in North America. They can be found from Florida to Alaska.
13 March 2014, 01:10 AM ET
Cleopatra was an Egyptian queen who is mostly remembered for her love affairs. However, she was a shrewd and powerful ruler.
12 March 2014, 02:47 PM ET
Creatine is a performance-enhancing supplement used by athletes and other people, often in the hope of building muscle. But does creatine work? And is it safe to take? Here's a look at what science has to say about taking creatine.
12 March 2014, 02:33 AM ET
Heroin is an opiate drug and a high potential for abuse.
11 March 2014, 12:35 AM ET
Corn snakes are non-venomous snakes found primarily in the southeastern United States. They are popular as pets.
11 March 2014, 12:28 AM ET
Germans place a high value on hard work, precision and order, and have made tremendous contributions to engineering, classical music and beer. Here is an overview of German customs, traditions and values.
07 March 2014, 01:17 AM ET
Coral snakes are small, vibrantly colored, highly poisonous snakes found in Asia and in the Americas. When threatened, they make a popping sound with their cloacas — essentially a fart.
07 March 2014, 01:13 AM ET
Aspirin is a common pain reliever. Learn how aspirin works, what "baby aspirin" is for, what aspirin's side effects are, and whether you should give aspirin to your dog.