The earliest known life-forms are putative fossilized microorganisms, found in hydrothermal vent precipitates, that may have lived as early as 4.28 Gya (billion years ago), relatively soon after the oceans formed 4.41 Gya, and not long after the formation of the Earth 4.54 Gya.
Syncopal episode occurred when there
is sudden or temporary drop in blood flow to the brain which results into loss of
muscle control or loss of consciousness. Fainting or passing out can also be
referred to syncopal episode and condition usually last for only seconds or
minutes.