How many times has Earth orbited the sun?
We worked out how many trips each of the solar system's eight planets has taken around the sun over the past 4.6 billion years.
from Space https://ift.tt/86VQZWf
from Space https://ift.tt/86VQZWf
New method to detect and visualize sperm cells recovered from forensic evidence
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
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