What is the oldest known fossil?
cyanobacteria The oldest known fossils, in fact, are cyanobacteria from Archaean rocks of western Australia, dated 3.5 billion years old. This may be somewhat surprising, since the oldest rocks are only a little older: 3.8 billion years old! Cyanobacteria are among the easiest microfossils to recognize.
How old are dinosaur fossils?
At about 140 million years old, fossils from a huge dinosaur dug up in Argentina might be the oldest titanosaur yet discovered, scientists announced this week in a new study.
What was first animal on Earth?
comb jelly A comb jelly. The evolutionary history of the comb jelly has revealed surprising clues about Earths first animal.