This phenomenon requires generating photons with visible, UV wavelengths rather than hot, infra-red wavelengths, and it happens in nature.

This phenomenon requires generating photons with visible, UV wavelengths rather than hot, infra-red wavelengths, and it happens in nature.
Phlegrean Fields is waking up. Scientists are trying to predict what it will do next, and what its unrest means for volcanoes worldwide.
The way geckos’ ears work together to take in sound mirrors the way the detector works to map the angle of incoming light.
High in the Andes Mountains, conservators are testing traditional methods for strengthening adobe buildings.
The bell tower of the church of Santiago Apóstol in Kuño Tambo, Peru. Built by the Spanish in 1681, it has been weakened by earthquakes, but traditional techniques are helping with its restoration. Credit Credit Angela Ponce for The New York Times.
Oxford University forges intercultural understanding with objects from ethnographic and science collections.