The LED lights reduced entanglements by 63 percent, according to a new study. Breakthroughs, discoveries, and DIY tips sent every weekday. For fishers working the inky dark night, it can be difficult to keep endangered or unwanted animals out of their nets. While lighted nets can reduce the bycatch of sharks and sea turtles, their batteries are short lived, expensive to replace, and not always easy to dispose of. The lights themselves are also heavy, can make the nets sag, and not easy for fishers to work with.

In addition to responding to electrical and chemical stimuli, many of the body's neural cells can also respond to mechanical effects, such as pressure or vibration. But these responses have been more difficult for researchers to study, because there has been no easily controllable method for inducing such mechanical stimulation of the cells. Now, researchers at MIT and elsewhere have found a new method for doing just that. The finding might offer a step toward new kinds of therapeutic treatments, similar to electrically based neurostimulation that has been used to treat Parkinson's disease and other conditions. Unlike those systems, which require an external wire connection, the new system would be completely contact-free after an initial injection of particles, and could be reactivated at will through an externally applied magnetic field.