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reference A cathedral over 140 years in the making, a molecule magnified by 165 billion times, a tower with a 660,000-kilo golden heart and more.
Reference Copperhead snakes are common in North America, and have the distinction of biting more people in the United States than any other snake.
Reference Geiger counters use the natural process of ionization to detect and measure radiation levels
Discover the intricate network of specialised cells that make up your nervous system, and how this command center controls everything from thinking to walking.
Reference Cancer can affect any part of the body, requiring doctors to employ robust methods such as MRI scans, blood tests and computed tomography to detect and classify it.
REFERENCE Equinoxes occur twice a year when the sun is directly above the equator, and herald the beginning of spring and autumn.
reference Acid rain is any form of precipitation that contains acidic components, such as sulfuric or nitric acid. It affects nearly everything: plants, soil, trees, buildings and even statues.
Life's Little Mysteries investigates the meaning behind the medical emblem of two snakes entwined around a rod.
reference Centrifugal and centripetal are two closely related forces that describe circular motion, but the meanings are often mixed up.
Reference In the third week of pregnancy, there won't be any major outward changes in a woman's body, but some pregnancy symptoms may have started.
reference A colon cleanse is all the rage among wellness buffs. But health experts say that they aren't helpful and can actually be dangerous.
Reference Spinach is Popeye the Sailor Man's favorite veggie for good reason: it's dense in vitamins and minerals, low in calories and may help with several health conditions.
In the latest issue of How It Works: How we cleaned up the world's worst human-made disasters, how radar works, why we get addicted, the history of flight, and can we control the weather?
Reference The elements in the periodic table are arranged according to the transition from metal to nonmetal elements.
Reference Courtesy of Google Earth, check out some strange highlights of our planet, in lieu of a whirlwind trip round the world.
Reference Chemistry is the study of matter, its properties, how and why substances combine or separate to form other substances, and how substances interact with energy.
reference Riboflavin is a B-complex vitamin that helps the body break down carbohydrates, proteins and fats to produce energy.