Chronospermia

Chronospermia (also known as Time Stealing or Time Harvesting) is a form of time travel that is an extension of chronospectria. Unlike basic chronospectria, which merely allows for the past to be seen, chronospermia allows scenes from past to be meticulously "copied" into the present, so they can be studied in greater detail. Chronospermia merely makes a copy of a historical scene, and does not alter it in any way, and thus it does not violate causality.

Energy requirements
The energy requirements for chronospermia are enormous, far greater than those of simple chronospectria. The energy requirements always include the energy-equivalence of the mass copied from the past to the present, which even for a small amount of matter equates to a huge amount of energy. Usually, black hole draining is used to obtain the vast quantities of power necessary.