The earth is covered with clues.  Asteroids in the Gulf of Mexico and Northern Russia.  Fossils.  Archaeological artifacts.  Floods.  Volcanos.  Changes in polar magnetism.  The list goes on.  The earth has been under assault for millions of years   Years counted in days.  Days counted as one rotation.  Which may not have been 24 hours.  It could have been longer or shorter.  Genesis doesn't tell us.

I believe there is no error in the book of Genesis.  The more fossils that are found, the more archaeological artifacts that are found, the stronger my conviction.

The past is recorded in the ice in the Arctic.  Huge plugs are pulled from the ice and the yearly layers look like stripes on a popsicle.  Volcanos erupt, soot fills the atmosphere and dribbles down on the ice which holds the record like a diary.  The earth reveals its secrets.  The layers can be counted in years. Volcanic eruptions from thousands of years ago can be dated.

Fossils found in the highest mountains tell us that those mountains were once a seabed. The fossils tell us of creatures that existed "once upon a time".  They were alive.  Now they are gone.

But something interesting is held in these records.  A cricket 'then' looks like a cricket now.  A shark 'then' is recognizable as a shark now.  A fly preserved in a drop of amber looks like a fly today. The list goes on.  And another interesting fact: creatures once declared extinct show up alive in our ocean depths.  It so happens that they weren't extinct after all.