Short-term disability insurance, which is most often purchased as part of a group at work, can be paid by either the employer or the employee. Group short-term disability insurance policies are guaranteed issue, meaning you do not have to take a medical exam to buy coverage.
In 1650, Otto von Guericke invented the air pump, used to create a partial vacuum. Using hollow copper spheres and an air pump of his own construction, Guericke demonstrated that a partial vacuum could be created by pumping the air out of the sphere.
The first known test of a purpose-made parachute was carried out in 1617 by Croatian inventor Faust Vraneiae, who had been working on his canopy - adapted from a Leonardo da Vinci sketch - as early as 1595. Vraneiae tested his invention, known as homo volans (flying man), by jumping off towers in Venice.