Learn about carbon dating or radiocarbon dating in science. Discover its history, how it works, its uses, and its limitations. Carbon Dating or Radiocarbon Dating Explained This entry was posted on January 29, 2025 by Anne Helmenstine (updated on November 18, 2025)
Learn the difference between true north and magnetic north, where they are, how to find them, and when to use them. True North and Magnetic North – Know the Difference This entry was posted on January 28, 2025 by Anne Helmenstine (updated on February 2, 2025)
Learn about ribosomes in cell biology, including the definition, structure, function, and facts in both prokaryotes and eukaryotes. Ribosomes Function, Structure, and Facts This entry was posted on January 25, 2025 by Anne Helmenstine (updated on December 2, 2025)
Learn about apparent magnitude in astronomy. Get its definition and a table of values. See how to calculate it, with example problems. Apparent Magnitude in Astronomy This entry was posted on January 22, 2025 by Anne Helmenstine (updated on July 29, 2026)
Learn about chemiluminescence in chemistry. Get the definition, examples, reactions, and compare it with other forms of luminescence. Chemiluminescence – Definition, Examples, Reactions This entry was posted on January 21, 2025 by Anne Helmenstine (updated on April 8, 2026)
Get lanthanum facts. Discover the properties, uses, sources, and health effects of the element with atomic number 57 and element symbol La. Lanthanum Facts – Atomic Number 57 or Symbol La This entry was posted on January 18, 2025 by Anne Helmenstine (updated on January 19, 2025)
Learn how many teeth humans have. Get facts about tooth anatomy, structure, and function in both babies and adults. How Many Teeth Do Humans Have? Tooth Anatomy and Functions This entry was posted on January 15, 2025 by Anne Helmenstine (updated on April 30, 2025)
Discover egg substitute options for recipes, backed by cooking chemistry. Find substitutes for baking, including cakes, and binding. Egg Substitute in Recipes – Cooking Chemistry This entry was posted on January 14, 2025 by Anne Helmenstine (updated on January 26, 2025)
Learn about the geologic time scale or GTS. Discover what it is, how it is divided, and the characteristics of each time period. Geologic Time Scale This entry was posted on January 11, 2025 by Anne Helmenstine (updated on March 28, 2026)