For the first time, scientists have used light pulses to control a living animal's heartbeat, in a breakthrough that could lead to a greater understanding of congenital heart defects and even optical pacemakers.
Researchers led by Michael Jenkins at Case Western Reserve University in Ohio placed a laser fiber a millimeter away from a two-day-old quail embryo's heart. Using laser pulses, they were able to pace the heart's contractions, with no apparent damage to the developing tissue.
A new microscope enables scientists to see the intricate 3-D structure of everything from cartilage to Velcro.
By Gunjan Sinha
Posted 12.11.2001 at 1:31 pm 2 Comments
Before Russell Kerschmann came along, the world through a microscope looked much the way people perceived the world at large to be before Columbus set sail: flat. Microscopes let us see an object's surface and get some sense of its insides, but its true three-dimensional architecture remained a mystery. No one knew exactly how the two parts of Velcro attach, or precisely how the network of pores in a paper towel enable it to suck up water, or even how the three different layers that make up our skin interact.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.