For the first time, scientists have successfully plotted the paths of sperm in 3-D, revealing corkscrew, like trajectories and “hyperactive” swimmers. By placing sperm on a silicon sensor, not unlike those found in smartphones and digital cameras. Then the researchers set red and blue LED lights on the sperm. The sperm cast two different-colored shadows, which they recorded. Later, they used a computer program to reconstruct the movements of the sperm cells based on the shadow movements, producing a holographic image.They found that most sperm move in straight, linear directions. But some are what they called “hyperactive,” with jerky direction changes and sometimes careening in reverse. Others swam in corkscrew, cyclical patterns, which had only been hinted at with microscope results.

(Source: futurenow321)