Learn whether Pluto is a planet and understand the differences between planets and dwarf planets. See what Pluto has in common with comets. Is Pluto a Planet? This entry was posted on July 30, 2023 by Anne Helmenstine (updated on January 20, 2026)
Learn about the factors that makes hair turn gray. Discover whether graying is reversible and what works to change hair color. Why Does Hair Turn Gray? Is Graying Reversible? Recently updated ! This entry was posted on July 29, 2023 by Anne Helmenstine (updated on October 14, 2026)
Can it be too hot to fly a plane? Here is the answer to the question and a look at the reasons and solutions. Can It Be too Hot to Fly an Airplane? This entry was posted on July 26, 2023 by Anne Helmenstine (updated on March 6, 2024)
Learn about the Grignard reaction and Grignard reagent in organic chemistry. Get examples and see why this reaction earned a Nobel Prize. Grignard Reaction and Grignard Reagent This entry was posted on July 25, 2023 by Anne Helmenstine (updated on November 4, 2025)
Learn about the associative property in math. Get the definition and examples for addition and multiplication. Associative Property in Math – Definition and Examples This entry was posted on July 23, 2023 by Anne Helmenstine (updated on September 10, 2023)
Get the condensation reaction definition and examples in chemistry. Learn about dehydration reactions and related synthesis reactions. Condensation Reaction Definition and Examples This entry was posted on July 22, 2023 by Anne Helmenstine (updated on June 10, 2026)
Learn about the Richter scale and how it measures the magnitude of an earthquake. Compare it to the moment magnitude scale. Richter Scale and Earthquake Magnitude This entry was posted on July 19, 2023 by Anne Helmenstine (updated on February 17, 2026)
Get the quadrilateral definition and learn about quadrilateral shapes and properties. Get geometry facts and example problems. Quadrilateral Shapes and Facts This entry was posted on July 18, 2023 by Anne Helmenstine (updated on November 11, 2025)
Make hot ice cream as a molecular gastronomy science project and learn the chemistry of how this tasty treat works. Hot Ice Cream Molecular Gastronomy Science Project This entry was posted on July 16, 2023 by Anne Helmenstine (updated on July 30, 2023)