Unlike 20th-century conflicts, modern wars are increasingly being fought at a distance. Here's how Israel's Spike missiles ...

Drone footage reveals orcas making tools from kelp to groom each other - Scientists observed the surprising social behaviour, ...

PhoSim simulates the atmosphere, including air turbulence, as well as distortions from the shape of the telescope’s mirrors and the electrical properties of the sensors. The photons are propagated ...