References
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.
07 March 2014, 12:53 AM ET
Next Generation Science Standards (NGSS) are a set of benchmarks for K-12 science education. The standards encourage students to develop critical thinking skills as well as scientific and mathematic literacy.
04 March 2014, 01:09 AM ET
Albuterol is a prescription medicine prescribed for patients struggling with asthma, emphysema, bronchitis and other lung diseases.
04 March 2014, 01:01 AM ET
Gynecomastia is the growth of breast tissue in males. It's a benign condition that usually results from an imbalance in the sex hormones estrogen and testosterone.
28 February 2014, 06:35 PM ET
Skara Brae is a well-preserved prehistoric village on the west coast of Orkney, Scotland. Visitors can still sit on the furniture in the stone huts.
28 February 2014, 10:47 AM ET
Use this body mass index (BMI) calculator to estimate your body fat and to see if you’re considered underweight, normal, overweight or obese.
27 February 2014, 11:50 PM ET
Augmentin is a prescription antibiotic that is used to treat bacterial infections.
27 February 2014, 12:33 AM ET
Memory involves encoding, storing, retaining and subsequently recalling information and past experiences.
26 February 2014, 12:47 AM ET
Rattlesnakes are found throughout North and South America. Their distinctive rattle warns intruders to stay away!
25 February 2014, 11:55 PM ET
Episodic memory is a person’s unique memory of a specific event; it will be different from someone else’s recollection of the same experience.
25 February 2014, 11:35 PM ET
Guan Yu was a Chinese military general whose martial prowess was so great that, after his death, he was deified as a god.
25 February 2014, 02:16 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.
25 February 2014, 01:48 AM ET
Johannes Gutenberg revolutionized printing technology by adapting the presses used for winemaking.