they have discovered dinosaur bones and much more such as crystals
They were discovered by scientists
Iron was discovered long before we had people who could be called scientists.
Medicines have been used longer than scientists have existed.
The scientists have discovered ozone hole due to technology. Advancements led them to find it.
A group of scientists.
thomas Edison
A bunch of scientists
Galileo.
An icy surface.
Scientists discovered chromosomes in DNA
It was not discovered it was invented and built by a team of scientists and engineers.
The scientists have discovered the ozone layer. It protects us.