Science in a nutshell

1.A neutron star is the remnants of a massive star that has run out of fuel. The dying star explodes in a supernova while its core collapses in on itself due to gravity, forming a super-dense neutron star. Astronomers measure the mind-bogglingly large masses of stars or galaxies in solar masses, with one solar

Antibacterial soap are making resistance to antibiotics as Darwin natural selection

 In early stage of our Earth their was no oxygen only carbon dioxide, methane and nitrogen contribute large part of our 

First post  Short answered you will die and long answer it depends on width and mass of coin.   1.Mass of a coin Think a 5 gram coin magically collapsed into a black hole this black hole would have a radius of about 10 to the power of -30 meters by comparison a hydrogen atom has 10 to the power -11 meters compare to size of the sun it would be like a atom it's 5 gram mass would convert into 450 terajoule of energy which will lead to explosion roughly 3 times bigger than The atomic bomb drop on Hiroshima and Nagasaki combined and you will die.