cricket!!
100
== ==
football
Soccer/cricket/rugby/wrestling probably a few more, 100 years isn't all that long ago
FEI- British Equestrian Federation
For most geological processes, 100 years is a very short time, so to answer your question, no.
The fastest turn-around time for communicating with a civilization 100 light years away would be 200 years, as it takes light 100 years to travel from Earth to the civilization and another 100 years for their response to reach us.
have no clue
There are heaps
100 years.
it is a time period of 100 years