Smithsonian Magazine on MSN1d
Scientists Discover Traces of Salt Water and Building Blocks of Life in NASA’s Samples From the Asteroid Bennu
Two new papers describe hints to a brine-filled environment on the 4.5-billion-year-old space rock and the presence of amino ...
Nature3y
Under the electron microscope, DNA molecules undergoing transcription exhibit Christmas-tree-like structures.
The trunk of each 'Christmas tree' (a transcription unit) represents a DNA molecule; the tree branches (granular strings attached to the DNA) are RNA molecules that have been transcribed from the ...
Purdue University8mon
Scanning Electron Microscope
SEM stands for scanning electron microscope. The SEM is a microscope that uses electrons ... special preparations must be done to the sample. All water must be removed from the samples because the ...
Nature5y
Electron and X-ray microscopy
Knowledge of the microscopic structure and composition of materials is essential for understanding their properties and designing functional devices. Microscopy techniques based on electrons and X ...