Living things, our planet, and the ideas behind discovery.
26 reads to exploreInformation owned by the U.S. government may be classified even when its unauthorized disclosure would only embarrass the government and would not harm national security, and even when it concerns failed scientific research.
Settle in for a read →Substitute the value into the equation, simplify each side separately, and check whether the two results are equal. If they are, the value is a solution; if not, it isn't.
Settle in for a read →Is Helium Classed as a Major Car Pollutant? The Short Answer Is No
Settle in for a read →The original classification authority (OCA) bears principal responsibility for the quality and accuracy of a derivative classification action.
Settle in for a read →Whale sharks don't prefer one water type in the way a fish prefers a reef or a river.
Settle in for a read →The carbon in glucose comes from carbon dioxide in the air, the hydrogen comes from water drawn up through the roots, and the oxygen in glucose also comes from that water — not from CO₂.
Settle in for a read →The statement is true. All four device families — tactical hand-held radio transceivers, cell phones, satellite phones, and personal locator beacons — are electronic communication devices.
Settle in for a read →The skull and crossbones pictogram tells you the chemical has acute toxicity — it can kill or seriously harm you after a single, short exposure.
Settle in for a read →No, paleontologists don't use kitchen blenders to uncover fossils.
Settle in for a read →Short answer: no. A long beak does not make a peacock easy to recognize, because a peacock's bill sits in the same modest range as hundreds of other bird species — roughly 4–6 cm on an adult Indian peafowl — while the bird's actual…
Settle in for a read →Saponification is a chemical change, and the boundary is the formation of new substances: once fat meets sodium hydroxide, the triglyceride molecules are consumed and replaced by soap molecules plus glycerin, so no physical process —…
Settle in for a read →Sterilization is the one action that destroys all viruses and spores, and it requires specific training and education.
Settle in for a read →Hospitals and clinics use radiation for diagnosis and treatment, and the foundational principle for keeping that exposure safe is ALARA — "as low as reasonably achievable."
Settle in for a read →Good air quality does mean low pollution levels for the pollutants being measured. That qualifier carries the entire answer.
Settle in for a read →No, crocodiles do not rely on antlers for movement in water.
Settle in for a read →No, the UV Index does not measure air quality. The UV Index is a forecast of the strength of sunburn-producing ultraviolet radiation reaching the Earth's surface at solar noon, expressed on a 0–11+ scale set by the World Health…
Settle in for a read →Mick Jagger of the Rolling Stones sang backing vocals on "You're So Vain." Carly Simon has confirmed it herself, repeatedly and on the record.
Settle in for a read →The Cretaceous period, 145 to 66 million years ago, is the answer — it outlasted the Jurassic by 79 million years and produced the largest land animals that ever lived.
Settle in for a read →The tool most commonly used to uncover ancient fossils is the geological rock hammer, also called a mason's hammer or fossil pick.
Settle in for a read →The feature that makes platypuses stand out most is electroreception: they hunt by detecting the faint electric fields of their prey underwater, a sense so foreign to mammals that it exceeded anything scientists thought a furry animal…
Settle in for a read →Roughly 117 billion people are estimated to have ever been born on Earth, according to the widely cited calculation by demographer Carl Haub for the Population Reference Bureau.
Settle in for a read →The fastest land animal is the cheetah (*Acinonyx jubatus*), which reaches a top speed of roughly 61 mph (98 km/h) in short bursts lasting about 20 seconds.
Settle in for a read →No, Isaac Newton is not credited with creating the periodic table. That credit belongs overwhelmingly to Dmitri Mendeleev, who published his first table in 1869 and used it to predict three undiscovered elements.
Settle in for a read →No, webbed feet don't make a peacock easy to recognize — because peacocks don't have webbed feet. A peacock's foot carries three forward toes and one backward toe, all separate, with no webbing between them.
Settle in for a read →No, platypuses are not naturally found in Antarctica. The species *Ornithorhynchus anatinus* is endemic to freshwater systems of eastern mainland Australia and Tasmania, and no platypus population—native, introduced, or fossil—has ever…
Settle in for a read →The standardized listing is the Safety Data Sheet, a 16-section document whose order is fixed by the United Nations Globally Harmonized System, and its value shows up in the first ten minutes of a chemical review: Section 2 tells you the…
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