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The esophagus is a tube that connects the throat (pharynx) and the stomach. Within it, muscles contract to move food to the stomach.
Not getting enough sleep really does boost your risk of catching a cold, a new study suggests.
A rare and fatal brain disorder called multiple system atrophy (MSA) may be caused by a newly discovered prion.
A podium that dates to the Second Temple Period may have been used as an ancient lost and found or a podium for itinerant street preachers, new excavations reveal.
With stem-cells and a novel scaffolding, researchers are developing a new approach to lab-grown bones.
Before they plunged into the icy waters of the North Atlantic, passengers aboard the Titanic may have feasted on corned beef, potted shrimp and dumplings.
Boston Dynamics' sure-footed humanoid bot is one of many supermobile machines that are cool and capable.
125-million-year-old microbes were trapped in ancient seafloor rocks by minerals, leaving a record from the earliest days of the Atlantic Ocean.
The blind spot of the human eye can be shrunk with certain eye-training exercises, a small new study suggests.
One of the toothy stars of "Shark Week" has just phoned home after five months at sea, revealing that this longfin mako shark was a prolific and deep-diving swimmer.
For a very small, but growing number of people, diminutive dwellings are making dreams come true.
An elusive sea creature that boasts a vibrant golden shell covered in thick, slimy hair was recently spotted for the first time in 31 years, researchers say.
The complicated world of hyena sex involves social hierarchies, weird and potentially dangerous courtship rituals and female pseudopenises that make forced sex impossible.
A new report advises parents to start talking to their children early about alcohol, in order to prevent dangerous consequences.
Common mullein, Verbascum thapsus, is a perennial herb that was first introduced into the United States in the mid-1700s. Check out these photos of a fascinating plant.
Though meteorologists knew Hurricane Katrina would slam New Orleans with levee-toppling intensity, today's weather forecasters are even better equipped to give notice of a storm's coming havoc.
The most successful creatures on the planet, insects are a wild bunch. From six-legged critters with forehead eyes and breathing holes on their sides to a dragonfly with a 2.5-foot wingspan, here are some of the most amazing and wacky insect facts.
The large intestine, also called the colon, is part of the final stages of digestion. It is a large tube that escorts waste from the body.
The Galápagos are more than a life raft in Pacific currents — they actually alter the Pacific currents, and in so doing, help feed the islands' residents.