How distance, time, speed, weight and temperature are measured weighing a whale how a speedometer works the National Institute of Standards and Technology measuring tapes made by Stanley Tools.
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Winding 6,000 kilometers through undulating mountains, it is said to be visible with the naked eye from the moon historians, engineers, and scientists explore one of the wonders of the ancient world.
When finally completed, China's Three Gorges Dam will tower 607 feet in the air and weigh more than forty Great Pyramids along with China's Great Wall, it will constitute of the two man-made objects visible from the moon.
Dynamite explodes hills, drills divide stone walls, and giant cranes pull 400,000-pound blocks from quarry pits rock serves as civilization's raw material for roads, buildings, paint, glue, makeup, antacids, and chewing gum.
An underground subway system transforms the bustling metropolis of Athens, Greece, alleviating chronic traffic problems, meeting the needs of the 2004 Olympics and uncovering thousands of invaluable artifacts.
Explore basements from Pompeii to Pittsburgh ancient Hittites, Phrygians, and Persians carved subterranean rooms for storage and shelter, Greeks and Romans valued them, Renaissance architects hid kitchens there, and Colonial Americans expanded use.
It was a science first conjured amid the fiery ovens of ancient blacksmiths today more than 50% of all U.S. products require some form of welding.
Blade implements have been a part of civilized man's arsenal since the Paleolithic Age, when sharp tools were chipped off of flint or obsidian but with the discovery of metallurgy, people were able to forge stronger, more versatile blade implements.
Since the invention of gunpowder, fireworks have thrilled audiences around the world the highlights of fireworks exhibitions throughout history, and go behind the scenes to explore how science and art mingle in this unique, ancient craft.
Wartime research and development have revolutionized communication, transportation, and medicine from Spam to nuclear power to hairspray and cell phones, life as we know it ironically owes a lot to war.
In this history of medicine under fire, a small army of medics, nurses, surgeons, stretcher-bearers, and ambulance drivers races to keep pace with the deadly advances of war.
In 1941, penicillin was first used to save human life now, bacteria has emerged resistant to every known antibiotic and scientists have begun to fear that the era of the wonder drugs is near to its end.
Traces physical fitness' role in the health of the individual and society from ancient Greek gymnasiums, where pupils pumped up the mind as well as body, to 19th-century Muscular Christians, who saw exercise as an obligation to God.
More than two million people die in the U.S. annually, creating 5,500 daily burials with 80 percent choosing caskets and 20 percent cremation explore dealing with death throughout centuries and today's $20-billion funeral industry.
Tobacco's ancient discovery and Andes cultivation leads to modern North Carolina farming and Dominican Republic Fuente cigar plantation explore harvesting techniques, public health concerns with Surgeon General, and nicotine replacement therapies.
The beverage coffee originates in Ethiopia more than 1,000 years ago.
Americans eat over three and a half billion pounds of chocolate each year--that's 12 pounds per person per year with annual sales topping $13 billion.
Wartime research and development have revolutionized communication, transportation, and medicine from Spam to nuclear power to hairspray and cell phones, life as we know it ironically owes a lot to war.
In this history of medicine under fire, a small army of medics, nurses, surgeons, stretcher-bearers, and ambulance drivers races to keep pace with the deadly advances of war.
In 1941, penicillin was first used to save human life now, bacteria has emerged resistant to every known antibiotic and scientists have begun to fear that the era of the wonder drugs is near to its end.
Traces physical fitness' role in the health of the individual and society from ancient Greek gymnasiums, where pupils pumped up the mind as well as body, to 19th-century Muscular Christians, who saw exercise as an obligation to God.
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