Learn about heat lightning in meteorology. Discover what it is, how it works, where it occurs, and how it differs from dry lightning. Heat Lightning – What It Really Is This entry was posted on March 16, 2024 by Anne Helmenstine (updated on April 15, 2026)
Get amphibian facts. Discover the definition, characteristics, life cycle, and examples of animals that are and are not amphibians. Amphibians – Definition, Examples, Characteristics This entry was posted on March 13, 2024 by Anne Helmenstine (updated on June 9, 2026)
Learn why planets are round. Also, discover why stars and moons are round and some planets are slightly flattened. Why Are Planets Round? This entry was posted on March 12, 2024 by Anne Helmenstine (updated on January 20, 2026)
Learn about stromatolites in geology and biology, including how they form, why they are important, and where to see them. Stromatolites – The Earliest Fossils This entry was posted on March 10, 2024 by Anne Helmenstine (updated on March 17, 2024)
Learn about polonium. Get element facts about Po or atomic number 84, including its discovery, uses, sources, and hazards. Polonium Facts – Po or Atomic Number 84 This entry was posted on March 9, 2024 by Anne Helmenstine (updated on March 12, 2024)
Learn about heat in thermodynamics in physics and chemistry. Get the heat definition, formulas, and example calculations. What Is Heat? Definition and Formulas This entry was posted on March 6, 2024 by Anne Helmenstine (updated on March 17, 2026)
Compare ectothermic vs endothermic (cold blooded vs warm blooded) animals. Get examples of each type, exceptions, and their pros and cons. Ectothermic vs Endothermic – Cold Blooded vs Warm Blooded Animals This entry was posted on March 5, 2024 by Anne Helmenstine (updated on January 28, 2026)
Learn about centripetal force in physics. Get the definition, examples, formula, and answers to frequently asked questions. Centripetal Force Definition, Examples, and Formula This entry was posted on March 3, 2024 by Anne Helmenstine (updated on April 8, 2026)
Learn about reptiles or class Reptilia. Get the definition, examples, and characteristics of reptiles, as well as interesting facts. Reptiles – Definition, Examples, Characteristics This entry was posted on March 2, 2024 by Anne Helmenstine (updated on May 30, 2026)