4 days ago · Dinosaur, the common name given to a group of reptiles, often very large, that first appeared roughly 245 million years ago and thrived worldwide for nearly 180 million years. …

Dec 12, 2025 · Tyrannosaurus rex, species of large predatory theropod dinosaurs that lived during the end of the Cretaceous Period (about 66 million years ago) known from fossils found …

Political spectrum, a model for classifying political actors, parties, or ideologies along one or more axes that compare them. Tradition dating back to the French Revolution places ideologies that …

Dec 5, 2025 · Silk Road was an online black market known for its sale of illegal drugs and for hosting other illicit activities. The site was founded by Ross Ulbricht in 2011 and eventually …

Dec 6, 2025 · Martin Luther King, Jr., was a visionary leader and advocate for equality who spearheaded the civil rights movement in America through nonviolent protests, inspiring …

Dec 10, 2025 · A cell, in biology, is the basic membrane-bound unit that contains the fundamental molecules of life and of which all living things are composed. A single cell may be a complete …

This Encyclopedia Britannica list highlights 12 gods and goddesses of the Ancient Greek pantheon.

3 days ago · Triceratops, large quadrupedal plant-eating dinosaur that had a frill of bone at the back of its skull and three prominent horns. Fossils date to the final 3 million years of the …

Nov 25, 2025 · Beginning in 1973 with the U.S. Supreme Court ’s ruling in Roe v. Wade, Americans’ right to abortion was protected by a constitutional right to privacy. The Court …

3 days ago · Germany is a country of north-central Europe. Although Germany existed as a loose polity of Germanic-speaking peoples for millennia, a united German nation in roughly its …