Weegy: It is the a block of ice melting in the sun
User: Which question could be answered using DNA as a molecular clock?
How old is a dinosaur bone?
How long ago was a dinosaur track left in the mud?
How long ago did two species of birds share an ancestor?
How old was a bird when it died? Weegy: How long ago did two species of birds share an ancestor? User: Which subatomic particles have an electrical charge? Weegy: electrons ... (More)