The present is the in progress period of time in whichever length said period of time is measure.
Could be hours, seconds, a single instance or centuries, depending on what you're measuring.
Could be "important" events in history. For example a war or the existence of a species. Or the time that the earth exists. Or just dinner or the moment you're reading this.
Basically anything you can preceed with "right now" is the present in some measure of time.
For example "Right now I'm typing this." or "Right now dinosaurs are extinct."
In the second example, the present is from the moment dinosaurs went extinct up until either someone builds Jurassic Park or the end of time, whichever happens first.
Basically, the present is a range of time greater than 0 which the current instance is a part of.
Could be hours, seconds, a single instance or centuries, depending on what you're measuring.
Could be "important" events in history. For example a war or the existence of a species. Or the time that the earth exists. Or just dinner or the moment you're reading this.
Basically anything you can preceed with "right now" is the present in some measure of time.
For example "Right now I'm typing this." or "Right now dinosaurs are extinct."
In the second example, the present is from the moment dinosaurs went extinct up until either someone builds Jurassic Park or the end of time, whichever happens first.
Basically, the present is a range of time greater than 0 which the current instance is a part of.