Chiral metasurfaces guide twisted light into free space

Most predators slow down when ocean temperatures shift. Great hammerhead sharks don't—not significantly anyway. These ocean predators are masters of the "thermal hustle," maintaining peak hunting performance across a surprisingly wide range of ocean temperatures between winter and summer months, according to new research published this week in Journal of Experimental Biology.

In the medieval European imagination, racial difference was often highly polarized. Black people were perceived either as exotic status symbols—including saints and wealthy rulers such as the Queen of Sheba—or as subjugated figures, considered inferior to white Christians.

A Université de Montréal study has found a previously unknown mechanism in bacterial reproduction that could be attacked by future antibiotics. Bacteria reproduce by dividing into two: they form a wall, or septum, between the two future cells while remodeling the old cell walls so the so-called "daughter" cells can separate without bursting. Until now, scientists had believed that once the dividing wall was built, bacteria gradually break down the links between its two sides to allow the cells t

A new, miniature laser source developed by applied physicists in the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) and the Technical University of Vienna (TU Wien) could soon pack the power of a laboratory-based spectrometer—an important workhorse tool for precision environmental gas analysis—onto a single microchip.