The Roman empire's onager catapult used torsion—twisting an object, in this case a restraining rope or spring, by applying torque—to build tension in the arm and generate a powerful swing. The onager ...

Prince Mohammed bin Salman Royal Reserve proudly announces the reintroduction of the Persian onager to Saudi Arabia, marking the species’s return to the Kingdom after more than a century of absence.

The birth of a Persian onager at the Smithsonian Conservation Biology Institute in Front Royal, Va., Wednesday, Sept. 7, is a boon for a vital program that seeks innovative ways to manage endangered ...

In April 2024, seven Persian onagers were translocated from the Royal Society for the Conservation of Nature's Shaumari Reserve in Jordan to the Reserve, establishing the first wild population in the ...