One of the most valuable forms of forensic evidence in cases of male-perpetrated sexual assault is the presence of semen, either in the form of stains left behind on items or on swabs collected from victims after an offense. To confirm that semen is present, suspected stains are examined under a microscope to see if any sperm cells are visible. from Phys.org - latest science and technology news stories https://ift.tt/2XBwacB
The mystery of how early universe supermassive black holes grew so quickly may be solved, with the James Webb Space Telescope finding the first evidence of "heavy seeds." from Space https://ift.tt/vmcNhnK
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