20 inventions that changed the world | Live Science
2023年7月19日 — Wheels were invented circa 3,500 B.C., and rapidly spread across the Eastern Hemisphere. (Image credit: James Steidl via Shutterstock) Before the invention of the wheel in …
The four seasons of the year: spring, summer, autumn (fall) and …
2022年2月11日 — Seasons are periods of the year with distinct weather conditions and day lengths. Earth's four seasons are spring, summer, autumn (fall) and winter.
Temperature: Fahrenheit, Celsius, Kelvin | Live Science
2021年3月22日 — Hot and cold are measured using a numeric scale called temperature. Temperature scales are how we communicate about the weather, measure safety and comfort …
Darwin's Theory of Evolution: Definition & Evidence - Live Science
2022年10月14日 — Charles Darwin's theory of evolution and natural selection isn't an idea with holes. It's one of the most solid theories in science. But what exactly is it?
History of computers: A brief timeline | Live Science
2023年12月22日 — The history of computers goes back over 200 years. At first theorized by mathematicians and entrepreneurs, during the 19th century mechanical calculating machines …
The solar system: Facts about our cosmic neighborhood
2022年2月25日 — An image of a massive solar flare (or coronal mass ejection) erupting out of the sun in 2017. (Image credit: NASA) The sun is at the center of the solar system and is its …
The 20 largest recorded earthquakes in history | Live Science
2023年1月27日 — Map showing the location of the Arequipa earthquake in Peru (2001). (Image credit: USGS) A magnitude 8.4 earthquake struck 4 miles (6 km) from the coastal town of …
Deforestation: Facts, causes & effects | Live Science
2023年4月28日 — Why do people destroy forests? Often, deforestation occurs when people cut or clear forested area to make way for agriculture or grazing. The Union of Concerned Scientists …
Human heart: Anatomy, function & facts - Live Science
2022年7月27日 — The human heart is located in the center of the chest - slightly to the left of the sternum (breastbone). It sits between your lungs and is encased in a double-walled sac called …
Is Mount Everest really the tallest mountain on Earth?
2022年10月28日 — Researchers have measured Mount Everest many times over the past few decades, but the latest assessment, announced in November 2021, puts it at 29,031.69 feet …