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 SinhaPosted 12.11.2001 at 12:31 pm 1 Comment
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.