Neutron star definition, formation, structure, properties, types, and importance. Learn how these ultra-dense stellar remnants shape the universe. Neutron Star – Definition, Formation, Structure This entry was posted on February 28, 2026 by Anne Helmenstine (updated on July 28, 2026)
Seaborgium facts: discovery, isotopes, chemistry, naming dispute, properties, and position in the periodic table. Seaborgium Facts – Symbol Sg or Atomic Number 106 This entry was posted on February 25, 2026 by Anne Helmenstine (updated on February 28, 2026)
What is acid rain? Learn its causes, chemistry, environmental effects, pH range, and how regulations reduce sulfur and nitrogen pollution. Acid Rain – Definition, Causes, Chemistry, and Effects This entry was posted on February 24, 2026 by Anne Helmenstine (updated on August 1, 2026)
Learn the heliocentric model of the Solar System, its history, evidence, mathematics, and differences from the geocentric model. Heliocentric Model of the Solar System (Heliocentrism) This entry was posted on February 21, 2026 by Anne Helmenstine (updated on May 16, 2026)
Learn what organ systems are, the major human organ systems, how they work together, and how organ systems function in animals and plants. Organ Systems in Biology – Definition, Functions, and Examples This entry was posted on February 18, 2026 by Anne Helmenstine (updated on August 4, 2026)
Learn what geological faults are, how they form, types of faults, key terminology, fault rocks, and their impacts on Earth and people. Faults in Geology – Definition, Types, and Impacts This entry was posted on February 17, 2026 by Anne Helmenstine (updated on February 22, 2026)
Plasma is the fourth state of matter. Learn what it is, how it forms, its properties, types, examples, and how it differs from other states. Plasma State of Matter in Physics This entry was posted on February 14, 2026 by Anne Helmenstine (updated on March 11, 2026)
Learn what osmosis is, how it works, and why it matters in biology, medicine, and everyday life. Includes examples and key terms. Osmosis – Definition, Process, and Importance in Biology This entry was posted on February 11, 2026 by Anne Helmenstine (updated on June 20, 2026)
Learn what transpiration is, how it works in plants, why it's important, and how it affects the water cycle and climate. Transpiration – Definition, Process, and Functions This entry was posted on February 10, 2026 by Anne Helmenstine (updated on February 22, 2026)