New Double Helix Visualization Revises What We Know About DNA

New Double Helix Visualization Revises What We Know About DNA: Results reaffirmed the structure first suggested by Watson and Crick in 1953. But surprisingly, the single-molecule images showed major variations in the depths and grooves in the double helix structure.

Video: New Shape Born From Rubber Bands | Science/AAAS | News

Video: New Shape Born From Rubber Bands | Science/AAAS | News: In an attempt to create a spring that replicates the light-bending properties of cuttlefish ink sacs, a team of researchers suspended two rubber strips of different lengths. Connecting the bottoms of the two strips to a cup of water, the shorter band stretched to the same length as the longer one. After gluing the two stretched strips together, the researchers gradually drained the water from the cup. As the bands retracted and twisted from the reduced strain, the researchers were shocked to see a hemihelix with multiple perversions form...