impurities

'Curious' cleaning dust on Mars rocks
The US Aeronautics Agency (NASA) said 'Curious' is carrying out the cleaning of the red dust on the surface of the Martian rock.
Detecting contaminated metals and debris in a series of human vaccines
The researchers examined 44 samples of 30 different vaccines and found dangerous contaminants, including red blood cells and toxic metals in all samples, except a vaccine sample.