22 July 2014, 08:55 PM ET
Solid is a state of matter in which the molecules are packed closely together and usually arranged in a regular pattern. A solid object has a fixed shape and volume.
16 July 2014, 02:23 PM ET
When looking for a meal, prehistoric people in Africa munched on the tuberous roots of weeds such as the purple nutsedge, according to a new study of hardened plaque on samples of ancient teeth.
16 July 2014, 01:52 PM ET
Pioneers had plenty to worry about on their journeys west, but the earliest Mormons survived their treks across the Great Plains in high numbers, new research finds. The mortality rate of Mormon pioneers was barely higher than average.
16 July 2014, 01:40 PM ET
Thousands of years after the invention of a formal writing system, a new study finds that the ancient people of the Middle East may have continued to use a more primitive way of recording information: clay tokens.
15 July 2014, 11:49 AM ET
Scenes of life, including that of an ancient priest and his dog, come to life in this wall painting on fine white plaster found in ancient Egypt just east of the Great Pyramid. The researchers suspect other tomb paintings await discovery.
15 July 2014, 11:38 AM ET
An ancient Egyptian painting, depicting scenes of life, has been discovered in the tomb of a possible priest located near the Great Pyramid at Giza.
15 July 2014, 03:41 AM ET
An Italian skeleton from the middle ages gets a diagnosis 700 years too late: The man had brucellosis, a livestock-transmitted disease that causes pain and reoccurring fevers, and, occasionally, death.
14 July 2014, 03:00 PM ET
On a ranch in northwestern Sonora, Mexico, archaeologists have discovered 13,400-year-old Clovis points mingled with bones from an extinct elephant relative called the gomphothere.
14 July 2014, 02:37 PM ET
Archaeologists have unearthed a small iron pin used to screw a false tooth into the mouth of ancient Celtic woman.
11 July 2014, 05:31 PM ET
A mosaic discovered in an ancient synagogue in Galilee depicts a bloody battle scene instead of a traditional Biblical scene.
11 July 2014, 12:48 PM ET
An excavation of Reynard's Kitchen Cave in the United Kingdom unearthed Iron Age and Roman coins.
10 July 2014, 04:41 PM ET
Over the course of his life, Nikola Tesla registered some 300 patents under his name, and traces of his inventions can be found in many modern-day devices, including in some unexpected places.
10 July 2014, 02:03 PM ET
An autopsy of a Korean mummy entombed in the 17th century shows that the man suffered from a potentially painful hernia during his lifetime, according to a new study.
10 July 2014, 12:58 PM ET
The so-called Andong mummy, belonging to a middle-age man, shows evidence of a diaphragm hernia, researchers find using CT scans and other methods.
10 July 2014, 10:52 AM ET
Nikola Tesla's final workshop, and perhaps the site of his boldest project, was nearly lost to history. Now the site known as Wardenclyffe is on its way to becoming a museum.
10 July 2014, 10:38 AM ET
Nikola Tesla bought a plot of farmland in the sleepy town of Shoreham, N.Y., in 1901 to build a lab and a transmitter tower. A nonprofit group took over the site in 2012 to convert it into a museum dedicated to the eccentric inventor.
10 July 2014, 07:18 AM ET
Nikola Tesla and Thomas Edison battled it out in the "War of Currents," but each inventor left a significant scientific legacy.
10 July 2014, 07:15 AM ET
Nikola Tesla has perhaps the broadest band of admirers of any historical figure. He is equally beloved by empirically minded scientists and those with a more mystical worldview.
09 July 2014, 10:34 PM ET
In the world of sport, we remember a winner. The history of science is often also described in similar terms.
09 July 2014, 03:35 PM ET
Nikola Tesla, who gave science some of its greatest technologies, has been somewhat overlooked for his achievements. Here are a few other scientists who were robbed of their dues in the annals of science.
09 July 2014, 02:18 PM ET
A young child who died 1,500 years ago is the earliest probable case of Down syndrome in the archaeological record, say scientists who examined the child's skeleton, particularly the skull.
09 July 2014, 01:58 PM ET
Nikola Tesla may be known today as one of history's greatest inventors, but the intrepid scientist's eccentricities have become as legendary as his trailblazing discoveries in the field of electricity.
09 July 2014, 12:00 PM ET
Skulls placed at the perimeters of Bronze Age settlements in Germany and Switzerland may have been gifts to lake gods to ward off flooding, new research suggests.
07 July 2014, 04:55 PM ET
Today is the 86th anniversary of the invention of sliced bread and the 134th birthday of its inventor, Otto Rohwedder.
07 July 2014, 03:37 PM ET
Humans were building in the Amazon before the rainforest existed, according to a new study of the ancient ecology of northeastern Bolivia. Mysterious earthen ditches were made when the region was a savanna.
07 July 2014, 08:08 AM ET
Life-size human statues and column bases from a long-lost temple dedicated to a supreme god, dating back over 2,500 years, have been discovered in the Kurdistan region of northern Iraq.
07 July 2014, 08:05 AM ET
Several artifacts, including life-size human statues of bearded males and the remains of a long-lost temple, have been discovered in the Kurdistan region of northern Iraq.
03 July 2014, 02:12 PM ET
The Declaration of Independence is now well preserved at the National Archives, but the document survived years of wear and tear.
03 July 2014, 02:01 PM ET
Three different human species may have walked the Earth at the dawn of the human lineage, and the ancestors of modern humans may have survived because of traits such as large brains that helped them adapt to unstable, shifting landscapes, researchers say.
02 July 2014, 01:11 PM ET
Genetic mutations from an extinct human lineage called the Denisovans help Tibetans and Sherpas live at high altitudes. The findings suggest interbreeding with other human lineages provided genetic variations that helped modern humans thrive.
30 June 2014, 03:00 PM ET
Native Americans in the Southwest underwent a baby boom from A.D. 500 till about A.D. 1300, largely because populations in the region shifted to a maize-based agricultural diet.
30 June 2014, 02:36 PM ET
Yosemite National Park celebrates its 150th anniversary today (June 30).