According to recent reports there is an excess correlation and an appa
rent regularity in the galaxy one-dimensional polar distribution with
a characteristic scale of 128h-1 Mpc. This apparent spatial periodicit
y can be naturally explained by a time oscillation of the gravitationa
l constant G. On the other hand, periodic growth features of bivalve a
nd coral fossils appear to show a periodic component in the time depen
dence of the number of days per year. We show that a time oscillating
gravitational constant with similar period and amplitude can explain s
uch a feature.