29 January 2014, 12:02 AM ET
Semantic memory is the recollection of nuggets of information we have gathered from the time we are young.
28 January 2014, 01:42 AM ET
Short-term memory loss occurs when a person can remember incidents from 20 years ago but is fuzzy on the details of things that happened 20 minutes prior. Medical conditions and injuries can cause short-term memory loss.
28 January 2014, 01:37 AM ET
Zofran: Dosage, Side Effects & Pregnancy
23 January 2014, 11:15 PM ET
People who have stigmata exhibit wounds that duplicate or represent those that Jesus is said to have endured during his crucifixion. Whether they appear spontaneously or are self-inflicted is difficult to verify.
23 January 2014, 11:07 PM ET
The Tower of London is a 900-year-old castle and fortress in central London that is notable for housing the crown jewels and for holding many famous and infamous prisoners.
23 January 2014, 12:14 AM ET
Portuguese explorer Ferdinand Magellan led the first voyage around the world.
22 January 2014, 11:10 PM ET
Acetaminophen is an over-the-counter pain reliever works by elevating the pain threshold so that only more intense pain is felt.
22 January 2014, 08:51 PM ET
A kidney stone is a hard mass that forms in the kidneys from minerals in the urine, and if large enough, can cause serve pain.
22 January 2014, 12:21 AM ET
Wood stoves, which have been around for hundreds of years, have been updated for the 21st century.
22 January 2014, 12:04 AM ET
An imaginary number is a number that, when squared, has a negative result.
17 January 2014, 01:47 AM ET
Martin Luther King Jr. was a civil rights leader who fought for racial and economic justice. His oft-quoted "I Have a Dream" speech made an incredible impact on the country’s racial, cultural and intellectual landscape.
15 January 2014, 10:54 PM ET
A real number is a value that represents a quantity along an infinite number line. They are, in fact, pretty much any number that you can think of.
14 January 2014, 06:54 PM ET
Here are some fun ways to demonstrate principles of fluid dynamics.
10 January 2014, 09:40 PM ET
America was named after Amerigo Vespucci, an explorer who first recognized that the lands in the New World were previously unknown continents.
10 January 2014, 09:41 AM ET
Vitamin D, sometimes called "the sunshine vitamin," is linked with many health benefits. But how much do you really need? And can too much vitamin D be harmful?
08 January 2014, 04:00 PM ET
Atorvastatin is a prescription medicine used to treat high cholesterol. It is sold under the brand name Lipitor.
07 January 2014, 11:34 PM ET
Clindamycin is a prescription antibiotic commonly used to treat acne, vaginal infections and certain bacterial infections.
07 January 2014, 11:23 PM ET
Ogopogo — a creature said to lurk in Canada's Lake Okanagan — is the most likely and best documented of all lake monsters.
06 January 2014, 07:54 PM ET
An X Prize is an award given to the person or organization that achieves specific goals set forth in competitions that are intended to spur innovation and technological development that could benefit mankind.
03 January 2014, 07:02 PM ET
Gabapentin is an anticonvulsant used to control specific types of seizures.
02 January 2014, 06:45 PM ET
Bed bugs are stubborn parasites that leave itchy and unsightly bites, though they don't transmit disease or pose any serious medical risk.
27 December 2013, 05:31 PM ET
Heart rate monitors provide immediate feedback on how hard you are working out so that you can make adjustments to get the greatest benefit from your exercise regimen.
27 December 2013, 05:21 PM ET
Blood pressure is one of the vital signs that doctors measure to assess general health.
26 December 2013, 06:24 PM ET
Facts about ibuprofen, including side effects and the risks for dogs and pregnant women.
26 December 2013, 06:19 PM ET
Yoga originated in India but has spread in the Western world as an exercise practice that links mind, body and breath.
24 December 2013, 12:32 AM ET
Lobotomy is a neurosurgical operation that involves severing connections in the brain's prefrontal lobe.
24 December 2013, 12:24 AM ET
Oxytocin is a hormone that plays a large role in social interactions and social bonding.
20 December 2013, 07:41 PM ET
The Byzantine Empire, also called Byzantium, was the eastern half of the Roman Empire that continued on after the western half of the empire collapsed.
20 December 2013, 06:34 PM ET
Ayurveda is an ancient health care tradition practiced in India.
18 December 2013, 11:19 PM ET
Heart rate, also known as pulse rate, is the number of times your heart beats per minute. A normal heart rate depends on the individual as well as a variety of factors.
18 December 2013, 10:03 PM ET
Bursting the bubble on claims that people have burst into flame.
18 December 2013, 02:18 PM ET
Melatonin supplements are often recommended for sleep problems, but the hormone has other effects on health too. Here's a look at what science says about the safety and effectiveness and effectiveness of melatonin supplements.