What Is a Light-year?
What Is a Light-year? Space is so vast that scientists don’t use miles to measure how far stars are away from us. The number of miles would be too large to work...
Read MoreWhat Is a Light-year? Space is so vast that scientists don’t use miles to measure how far stars are away from us. The number of miles would be too large to work...
Read MoreHow Deep Is the Deepest Spot in the Ocean? Off the island of Guam in the Pacific Ocean is a very deep, crescent-shaped trench called the “Mariana Trench.” Near the...
Read MoreWhy Is the Pound Abbreviated lb? Our abbreviation “lb.” for “pound” comes from the Latin “libra pondo,” meaning “a pound by Weight.” The ancient Romans invented the...
Read MoreHow Do Scientists Measure the Depth of the Ocean? Historically, before scientists developed new techniques, the depth of the ocean was actually measured by sending a...
Read MoreWhy Is Gold Measured in Carats? The term carat comes from the name of the bean of the carob tree. In earlier times, carob beans were used to measure the weight of gold...
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