References
19 September 2013, 05:20 PM ET
Rosalind Franklin was a scientist whose contributions to the discovery of the shape of the DNA molecule went uncredited for many years.
19 September 2013, 10:32 AM ET
The complete list of hurricane names for the 2013 season.
18 September 2013, 06:11 PM ET
Properties, sources and uses of the element uranium.
18 September 2013, 05:03 PM ET
A flu vaccine that is designed to protect against for strains of the flu virus will be offered for the first time in the 2013-2014 flu season.
17 September 2013, 10:28 PM ET
Spartacus was a gladiator who led a slave revolt against the Romans. While he is a popular character in movies and television, there is not a lot of information about him.
17 September 2013, 05:56 PM ET
Properties, sources and uses of the element protactinium.
16 September 2013, 07:06 PM ET
Elves have been a popular subject in fiction for centuries, and there are several types of elves.
16 September 2013, 07:03 PM ET
Nature is full of examples of traits that have been co-opted for new uses.
16 September 2013, 06:33 PM ET
Properties, sources and uses of the element thorium.
16 September 2013, 06:08 PM ET
Properties, sources and uses of the element actinium.
13 September 2013, 08:20 PM ET
The invention of the microscope opened up a new world of discovery and study of the smallest things. Exactly who invented the microscope is unclear.
12 September 2013, 09:04 PM ET
Aquifers are underground layers of rock that are saturated with water that can be brought to the surface through natural springs or by pumping.
12 September 2013, 06:44 PM ET
Properties, sources and uses of the element radium.
12 September 2013, 12:05 PM ET
Stevia is a sugar substitute that comes from a plant, and has no calories. But is it good for health? Here's a look at what the research says about stevia.
11 September 2013, 06:18 PM ET
Amyotrophic lateral sclerosis (ALS), also known as Lou Gehrig's disease, is a progressive and fatal neurological disease that causes the neurons that control voluntary muscles (motor neurons) to degenerate.
11 September 2013, 06:10 PM ET
Properties and sources of the element francium.
11 September 2013, 05:52 PM ET
Groundwater is any freshwater that lies beneath the surface of the Earth.
10 September 2013, 06:34 PM ET
Properties, sources and uses of the element radon.
09 September 2013, 08:19 PM ET
Yosemite National Park spans nearly 1,200 square miles and features many geological wonders.
09 September 2013, 06:02 PM ET
Properties, sources and uses of the element astatine.
05 September 2013, 09:03 PM ET
Giant sequoias and redwood trees grow hundreds of feet tall. They are found primarily in California.
05 September 2013, 04:37 PM ET
Properties, sources and uses of the element polonium.
05 September 2013, 04:20 PM ET
Properties, sources and uses of the element bismuth.
03 September 2013, 05:46 PM ET
The laws inscribed on a seven-foot stele are among the earliest set of rules for governing a people.
30 August 2013, 09:44 PM ET
Leonardo da Vinci, perhaps most noted as an artist, was also an architect, inventor and chronicler of science, among other outlets for his talents.
30 August 2013, 04:56 PM ET
Akhenaten was a pharaoh who made religious reforms, built a new capital at Amarna and sired Tutankhamun, one of the most famous ancient kings.
29 August 2013, 07:47 PM ET
29 August 2013, 07:38 PM ET
Atmospheric pressure is the force exerted against a surface by the weight of the air above the surface.
29 August 2013, 07:24 PM ET
Alchemy is the ancient practice of trying to turn lead into gold.
29 August 2013, 03:40 PM ET
Properties, sources and uses of the element lead.
29 August 2013, 03:00 PM ET
Properties, sources and uses of the element thallium.
28 August 2013, 10:37 AM ET
The periodic table arranges all of the known elements in an informative array.