A better hologram for fraud protection and wearable optics

Holograms are a ubiquitous part of our lives. They are in our wallets — protecting credit cards, cash and driver’s licenses from fraud — in grocery store scanners and biomedical devices.

When dung beetles dance, they photograph the firmament

The discovery that dung beetles use the light of the Milky Way to navigate in the world has received much praise.

Rapid eye movement sleep: Keystone of memory formation

For decades, scientists have fiercely debated whether rapid eye movement (REM) sleep -- the phase where dreams appear -- is directly involved in memory formation.

Found: Surviving evidence of Earth's formative years

New work from a team including Carnegie's Hanika Rizo and Richard Carlson, as well as Richard Walker from the University of Maryland, has found material in rock formations that dates back to shortly after Earth formed.

Ingestible robot operates in simulated stomach

In experiments involving a simulation of the human esophagus and stomach, researchers at MIT, the University of Sheffield, and the Tokyo Institute of Technology have demonstrated a tiny origami robot that can unfold itself from a swallowed capsule and, steered by external magnetic fields, crawl a

Pre-Clovis civilization in Florida; settlement 1,500 years earlier than previously believed

The discovery of stone tools alongside mastodon bones in a Florida river shows that humans settled the southeastern United States as much as 1,500 years earlier than scientists previously believed, according to a research team led by a Florida State University professor.