The sweeping beams of cosmic lighthouses called pulsars are much more energetic than previously thought, calling into question the bulbs that power them. A new analysis, from the High Energy Stereoscopic System array in Namibia, reveals a pulsar that radiates at 20 trillion electron volts — making it the most energetic pulsar ever seen. The finding, […]
How to run a marathon in under two hours
In an unofficial race in Vienna in 2019, Kenyan long-distance runner Eliud Kipchoge became the first person ever to run a marathon in under two hours. A new study shows how teamwork made that feat possible. Kipchoge ran with a rotating posse of pacers, other runners who deflected some of his air resistance in a […]