Since then, scientists around the world have been working to identify substances gathered from Comet Wild-Two.

VOA: special.2009.09.30

Then the scientists watched and recorded which way the sharks turned to follow the odor.

VOA: special.2010.08.03

Since then, scientists have been studying the ship and bringing to the surface many of the artifacts -- things made by hand -- that they have found.

VOA: special.2011.07.26

But scientists think the dinosaurs developed feathers first, and then wings.

VOA: special.2010.06.04

"How to make it,how to build it and then they will become scientists and engineers."

VOA: standard.2010.02.02