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13 February 2015, 08:47 AM ET
Hearts have become iconic symbols of Valentine's Day, but when it comes to hearts in the real world, one size doesn't fit all — particularly in the animal kingdom.
13 February 2015, 08:32 AM ET
Milky white rain poured down on eastern Washington state and northeast Oregon on a wintery morning last week.
13 February 2015, 07:17 AM ET
A 17-month-old girl went to the hospital over what doctors thought was a scorpion sting. Only later did they realize the real cause of her condition.
13 February 2015, 07:13 AM ET
The origins of Friday the 13th as an unlucky day are mysterious, though the idea probably emerged not much more than a century ago. Friday and the number 13 are the source of superstitions going back much further.
13 February 2015, 07:13 AM ET
Today is the first of three Friday the 13ths this year. Here are some of the strangest, most tragic and simply notorious events that have occurred on Friday the 13ths throughout history.
13 February 2015, 12:13 AM ET
More schools are divesting from fossil fuels, a trend that appears to be accelerating.
12 February 2015, 11:40 PM ET
While human culture and market experience may play a role in irrational decision-making, it now seems clear that choice biases are much more deeply rooted in our biology.
12 February 2015, 07:21 PM ET
The discovery of the head wound that very likely killed Richard III of England was caught on film and has now been released for the first time to the public.
12 February 2015, 06:30 PM ET
From having a screen name that starts with a letter in the first half of the alphabet to not sending indiscriminate messages, here are some strategies to win at online dating.
12 February 2015, 05:49 PM ET
A sword or the "top spike of a bill or halberd" caused a major sharp force trauma to the base of the English monarch's skull according to School of Archaeology and Ancient Histor and the East Midlands Forensic Pathology Unit.
12 February 2015, 05:26 PM ET
Megadroughts are droughts that last for more than 10 years. A new study finds that megadroughts are likely to strike the Southwest and Central Plains between 2050 and 2100.
12 February 2015, 03:35 PM ET
Two new species of early mammals were discovered in China: a horny-clawed tree-dweller and a tunnel digger with shovel-like paws.
12 February 2015, 03:03 PM ET
If you overnight on an ice sheet, consider getting one of these.
12 February 2015, 02:52 PM ET
Doctors who take care of very sick Ebola patients may feel socially isolated, but surprisingly, they may not feel more stressed, a new study from Germany suggests.
12 February 2015, 02:13 PM ET
Researchers have revealed the oldest tree-dwelling mammal ancestor and the earliest known burrowing mammalian. The amazing fossils were discovered in lake sediments in China and date back some 160 million years.
12 February 2015, 02:01 PM ET
A new protein is helping researchers to see brain activity in real time as never before.
12 February 2015, 02:00 PM ET
Scientists study ancient trees to learn about past droughts.
12 February 2015, 02:00 PM ET
Before this century ends, the Southwest and Central Plains states could shrivel under decades-long megadroughts worse than those that ended the Ancestral Pueblo civilization millennia ago.
12 February 2015, 01:50 PM ET
New nanotech is behind the latest hunt to find and track the millions of microbes in the microbiome.
12 February 2015, 12:53 PM ET
Extreme architecture for extreme environments.
12 February 2015, 12:00 PM ET
Can your dog tell whether you are content or annoyed? Yes, according to new research.
12 February 2015, 11:18 AM ET
For teens, curiosity about films like "Fifty Shades of Grey," if realized, can lead to harmful consequences.
12 February 2015, 10:32 AM ET
Science now has an answer to the famous question asked in the iconic Tootsie Roll Pop commercial, revealing how many licks it takes to get to the pop's gooey center. The research also unlocks the secrets of how objects dissolve in fluid flows.
12 February 2015, 10:27 AM ET
For college students, the pressure of graduating on time, studying for exams and ultimately planning for a career can lead to increased anxiety, stress and even depression. But now, there’s a new item to add to the list: student loans.
12 February 2015, 07:03 AM ET
During his 2014 Oscar acceptance speech for best actor, Matthew McConaughey recalled that a woman asked him, "Who's your hero?" He replied, "You know who it is? It's me in 10 years." His answer offers insight into how the powerful find inspiration.
12 February 2015, 07:02 AM ET
A woman experienced months-long headaches after a traumatic injury in a Pilates Reformer class caused spinal fluid to leak out of her spinal cord.
12 February 2015, 07:02 AM ET
Two new studies explain why some regions of the country are rattling more than others as oil and gas production rises.
11 February 2015, 09:09 PM ET
When a pregnancy ends unexpectedly through a miscarriage, a woman may recover physically long before she heals from it emotionally.
11 February 2015, 08:03 PM ET
Hepatitis is the inflammation of the liver, which is most often caused by a viral infection.
11 February 2015, 07:52 PM ET
Crohn’s disease is a chronic inflammatory bowel disease (IBD) that involves inflammation in all or part of the digestive tract.
11 February 2015, 07:45 PM ET
Studies have shown that devices such as magnetic bracelets have no more benefit than devices without magnets, in essence demonstrating the placebo effect magnets have on their users.
11 February 2015, 07:39 PM ET
Peak oil refers to the point in time when global oil production peaks and begins to drop.