  The possibility of an increasing gravitational constant $G$ and its
implication on the Earth's history are discussed. The model is consistent with
geophysical and astronomical data. The number of days in early epochs predicted
by the model is in agreement with those obtained from fossil corals. The model
predicts that the Earth was initially cold and is gradually heating up during
its course of evolution. The exact law for the variation of $G$ is still to be
obtained from the variation of the
  Earth's parameters with cosmic expansion.
