Europe is composed of 50 SOVEREIGN or self-governing States.
Men, because men are usually put into the labor aspect of the economy. Females aren't usually the ones to work in labor also children and elderly people cannot work to a certain extent and mostly not in labor.
A pulsar is a neutron star that gives off pulses of radio waves. The Crab Nebula, which is one of millions of gas and dust clouds in space, was found to house a pulsar in the system as is the central object present. Astronomers observing the nebula noticed that it released pulses of radiation that span the electromagnetic spectrum, pulsing radio, gamma and xrays.
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