"Scientists have long debated whether any other species can develop the ability to learn human language."

Those same scientists have long debated the goals of their field.

Then, while scientists were debating what to do, events took a turn for the worse.

Human cannibalism is not by chance, of course, though social scientists debate how common it was.

Nearly a century later, scientists are still debating what happened at that remote spot.

These were questions which scientists might still be debating when the newborn century drew to its close.

Scientists still debate the definition of life, so who is to say what art is?

Facts do not go away when scientists debate rival theories to explain them.

In theory, his idea was sound, but scientists long debated whether it actually happened in nature.

Now scientists are debating whether the diagnosis was correct and the fear justified.