What can fossils reveal about earth past?

Fossils show how organisms have changed over time.
Fossils also show us how Earth itself has changed. e.g. Similar fossils have been found on both sides of the Atlantic Ocean. Many of the organisms that left these fossils could not have crossed an ocean. The finding of these fossils in distant places supports the theory of CONTINENTAL DRIFT. This is the theory that the continents have been slowly drifting apart for millions of years.

May consider a group  g=({0,1},+)g=({0,1},+)where  ++  will work as the xor operator like we work in boolean algebra. note here, that ‘00’ and ‘11’ are not the usual 0 and 1 that we work with everyday. the elements are  called  ‘00’ and ‘11’ and  may not mean  zero (nothing) and one (single). ‘00’ is the identity for the given binary operator +, meaning that any element operated with ‘00’ gets us that element itself.  for a set  ss  in  g′g′  having more elements than just  {0,1}{0,1}  the values for  a+b∈sa+b∈s, such that  a∈s,b∈sa∈s,b∈s, have to be first defined, only then can you determine the value of  1+11+1. the answer could possibly have been  22  if oanswer is25,000