11 July 2013, 06:30 PM ET
Here are a few science fair project ideas for high school students.
11 July 2013, 06:26 PM ET
Properties, sources and uses of the element promethium.
11 July 2013, 04:21 PM ET
There are several types of science fair projects. Make sure you understand the rules and procedures when selecting a topic.
10 July 2013, 11:13 PM ET
The ship was the largest moving human object at the time it was built.
09 July 2013, 09:23 PM ET
Tai chi is a self-defense and calisthenics technique developed in China centuries ago.
09 July 2013, 08:49 PM ET
Millennials, also called Generation Y, were born between 1982 and 2000.
09 July 2013, 06:59 PM ET
Magnetism is the phenomenon that arises from the force between objects that produce fields that attract or repel other objects.
28 June 2013, 06:22 AM ET
The concept of zero, both as a placeholder and as a symbol for nothing, is a relatively recent development.
27 June 2013, 04:47 PM ET
A greenhouse gas is any gaseous compound in the atmosphere that is capable of absorbing infrared radiation, thereby trapping and holding heat in the atmosphere.
25 June 2013, 09:48 PM ET
The greenhouse effect occurs when Earth's atmosphere traps solar radiation because of the presence of certain gases, which causes temperatures to rise.
25 June 2013, 05:24 PM ET
The ancient city of Luxor, also called Thebes, served at times as Egypt’s capital and became one of its largest urban centers.
24 June 2013, 07:02 PM ET
The golden ratio is a geometric relationship that is found in nature, art and architecture.
24 June 2013, 07:00 PM ET
Epigenetics refers to external modifications to DNA that turn genes "on" or "off."
23 June 2013, 07:34 PM ET
Plate tectonics is the theory that Earth's outer shell is divided into several plates that glide over the mantle.
23 June 2013, 04:40 PM ET
Alan Turing, born June 23, 1912, broke the German Enigma code during World War II and developed a test for artificial intelligence.
21 June 2013, 06:02 PM ET
Properties, sources and uses of the element neodymium.
21 June 2013, 05:51 PM ET
Properties, sources and uses of the element praseodymium.
20 June 2013, 08:19 PM ET
Leprechauns are often described as wizened old men with pots of gold. But there is much more to the Irish folk legend.
20 June 2013, 02:13 PM ET
Properties, sources and uses of the element cerium.
20 June 2013, 01:25 PM ET
Properties, sources and uses of the element lanthanum.
19 June 2013, 09:34 PM ET
The Paleozoic Era ushered in an explosion of life on Earth.
19 June 2013, 05:51 PM ET
Properties, sources and uses of the element barium.
19 June 2013, 05:39 PM ET
Properties, sources and uses of the element cesium.
18 June 2013, 06:46 PM ET
The credit for inventing the first practical modern automobile goes to Karl Benz, but he was not the first to conceive of a self-propelled vehicle.
18 June 2013, 05:10 PM ET
This outpost was one of the most densely populated in the Maya world.
18 June 2013, 04:13 PM ET
Continental drift was the first attempt to explain why similar animal and plant fossils are found on different continents.
17 June 2013, 06:18 PM ET
Properties, sources and uses of the element xenon.
14 June 2013, 06:36 PM ET
The Fibonacci sequence is a series where a number is found by adding up the two numbers before it. It helps predict how rabbits breed and describes patterns in nature, from sunflower seeds to galaxies.
13 June 2013, 07:05 PM ET
Properties, sources and uses of the element iodine.
12 June 2013, 05:34 PM ET
While not explicitly mentioned in the Constitution, the right to privacy has been narrowly defined by case law and various statutes.
12 June 2013, 04:55 PM ET
Properties, sources and uses of the element tellurium.
12 June 2013, 04:15 PM ET
Definition of the element antimony, with sources, uses and the meaning of its symbol.