Also on these boards
NASA ECHO II S-131 // From Wikipedia: "Project Echo was the first passive communications satellite experiment. Each of the two American spacecraft, launched in 1960 and 1964, was a metalized balloon satellite acting as a passive reflector of microwave signals. Communication signals were bounced off of them from one point on Earth to another."
So amazing! A dune field on Mars in the north, less than 400 km from the north pole. During the Martian winter, carbon dioxide freezes out of the air. In the summer the CO2 turns directly from a solid to a gas disturbing the sand which falls down the slopes in little channels spreading out when it hits the bottom. This disturbs the red dust, which flows with the sand creating the feathery tendrils seen here
The Nikon Small World Photomicrography Competition / Dr. Igor Siwanowicz of the Max Planck Institute of Neurobiology in Martinsried, Germany shot "Portrait of a Chrysopa sp. (green lacewing) larva" at 20x magnification using the confocal method. (Dr. Igor Siwanowicz)
"The single neuron seen here was grown on sensitive piezoelectric cantilever arrays. When the neuron becomes electrically excited, the neuron deforms and applies nanonewton force to bend the cantilevers underneath. The bending of the cantilevers generates an electrical signal via piezoelectric effect. "