Scientists once believed that tyrannosaurus rex dragged its tail along the ground. today, they know that t. rex did not drag its tail but held it aloft, above the ground. this change in scientific consensus happened because

burning of wood and coal

explanation:

the panel also concluded there's a better than 95 percent probability that human-produced greenhouse gases such as carbon dioxide, methane and nitrous oxide have caused much of the observed increase in earth's temperatures over the past 50 years.

rocks and weathering-matching