Radiation exposure has always been a huge concern for astronauts working in space. “Astronauts are exposed to ionizing radiation with effective doses in the range from 50 to 2,000 Milli-Sievert,” ...
WASHINGTON - The military is recalling more than 18,000 protective vests because they did not meet ballistic test standards when the body armor was made up to five years ago. It is the second recall ...
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