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MICRO ROBOT                       IN COMING FUTURE                                                                            Source :  Ecole Polytechnique Fédérale de Lausanne The group of scientists -- led by Selman Sakar at EPFL and Bradley Nelson at ETH Zurich -- drew inspiration from bacteria to design smart, biocompatible microrobots that are highly flexible. Because these devices are able to swim through fluids and modify their shape when needed, they can pass through narrow blood vessels and intricate systems without compromising on speed or maneuverability. They are made of hydrogel nanocomposites that contain magnetic nanoparticles allowing them to be controlled via an electromagnetic field. In an article appe...
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A Cold Day on Mercury Global climate change caused by the greenhouse effect is one of the greatest challenges facing humanity today. To survive, we'll need to maintain the delicate energy balance that makes Earth a place for life to thrive. The hot daytime temperature on Mercury probably wouldn’t surprise you  it’s well over  ℃  but the nighttime temperature might. Without the sun’s direct illumination, the surface of Mercury drops to a frigid  ℃  overnight. Sunlight is absorbed by Mercury, which heats it up. But that heat energy doesn’t just stay there—it gets re-emitted as infrared light, the slice of the electromagnetic spectrum that we use for night or thermal vision. When Mercury emits light, that energy is lost forever, causing Mercury to cool down. It’s constantly being cooled by emission, but on the day side the sun is enough to keep it hot. At night, with no sunlight temperatures drop to a frigid  ℃.  
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