A large leopard with golden fur and dark rosette spots stands alert in a sun-dappled forest. A thick black tracking collar ...

This collared jaguar was among the animals followed in the international study on wildlife movement patterns. Cats and dogs ...

The world’s best clocks may be sensitive to an odd mix of quantum and relativistic effects that would stretch time and test ...

Time-varying systems, materials with properties that change over time, have opened new possibilities for the experimental ...

Eight-year-old Noorullah and his twin, Sanaullah, spend their days hauling yellow jerrycans on a wheelbarrow through Kabul's ...

It has black button eyes and long, thin whiskers that tremble when it looks around curiously. Unlike most rats, this one has ...