Answer:
the difference is that its bigger
Explanation:
its bigger because birds are much smaller than mammals and they dont have as big as bones like mammals
Scientists developed the time scale by studying rock layers and fossils world wide.
Radioactive dating helped determine the absolute divisions in the time scale. so mass extinction help because there is more to study
<span>Grasshoppers and caterpillars eat oak leaves.</span>
<h2>Answer:</h2><h2><em>About Two Thousand</em></h2><h2><em>About Twenty-Five Thousand</em></h2><h2><em>1780</em></h2><h2><em>About a Third Of</em></h2><h2>Explanation: </h2><h2><em>Thank Me Later</em></h2>