![]() An exception was the medieval trebuchet, powered by gravity. Nearly all catapults employed in ancient and medieval artillery operated by a sudden release of tension on bent wooden beams or of torsion in twisted cords of horsehair, gut, sinew, or other fibres. The term catapult too can refer to these weapons, but more often it designates a larger engine that is used to hurl stones from a single long arm swinging through the vertical plane. The ancient Greeks and Romans used a heavy crossbowlike weapon known as a ballista to shoot arrows and darts as well as stones at enemy soldiers. SpaceNext50 Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space!Ĭatapult, mechanism for forcefully propelling stones, spears, or other projectiles, in use mainly as a military weapon since ancient times.Learn about the major environmental problems facing our planet and what can be done about them! Saving Earth Britannica Presents Earth’s To-Do List for the 21st Century.Britannica Beyond We’ve created a new place where questions are at the center of learning.100 Women Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians.COVID-19 Portal While this global health crisis continues to evolve, it can be useful to look to past pandemics to better understand how to respond today.Student Portal Britannica is the ultimate student resource for key school subjects like history, government, literature, and more.From tech to household and wellness products. ![]() Britannica Explains In these videos, Britannica explains a variety of topics and answers frequently asked questions.This Time in History In these videos, find out what happened this month (or any month!) in history.#WTFact Videos In #WTFact Britannica shares some of the most bizarre facts we can find.Demystified Videos In Demystified, Britannica has all the answers to your burning questions.Britannica Classics Check out these retro videos from Encyclopedia Britannica’s archives.
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