The technique took some tweaking. Initially, the electric field generated by the beating heart muscle cells was too small to make a noticeable difference to the reflectance of the graphene.

Scientists found that dolphins have an ability to sense electric fields, which may help them hunt and navigate the seas. By Carolyn Wilke Newborn bottlenose dolphins sport a row of hairs along the ...

It’s time for another physics example. In this case, I am going to calculate the electric field due to an electric charged rod. Of course you could do this analytically using a bit of calculus.

This stuff is in 3-D. If you right click with the mouse you can rotate things around. There are two types of 3-D objects used in this code. There is the sphere and the arrow.

The field is weak, only 0.55 volts — about as strong as a watch battery, Collinson says. But that’s strong enough to control the shape and evolution of the upper atmosphere, features that ...