Why does light carry energy even though it has no mass? This video explains the real physics behind photons, energy–momentum relationships, and how light can transfer energy and momentum without mass.

In a landmark case taken by Mediahuis UK Limited against the Presbyterian Church in Ireland (PCI) and other named church respondents, a judge ruled that this newspaper had the right to publish ...

At Star of the Sea Church, the power is out, but mass is still on, with candles illuminating the church. Photo by Junyao Yang on Dec. 21, 2025. PG&E electricians were out in force in the Richmond ...

Each year, millions of travellers visit Iceland in the hope of catching a glimpse of the Northern Lights. Many tourists view the Aurora Borealis as a 'must-see' event while staying in the Arctic - and ...

A massive power outage plunged large swaths of San Francisco into darkness Saturday, knocking out electricity to about 130,000 homes and businesses and leaving self-driving cars stalled in city ...

At the University of Arizona, Jenn Frymark helped develop a greenhouse for extreme weather and then spent six months at the South Pole growing food for scientific researchers. Now she grows 10 million ...

All border wall contractors in Arizona are complying with President Biden’s order to pause construction, according to the Army Corps of Engineers. Biden ordered a pause in wall construction that would ...