So far scientists at five laboratories have failed to identify any known infectious agent as its cause.

When scientists fail to take women's knowledge into consideration, they lose vital information and even reduce their chances of success.

"I doubt if the scientists will fail to approve your plan now."

Arkon's top scientists would have never failed to put one in.

But all the Starship's attempts to contact the scientists had failed.

His scientists, whose best genetic weapon fizzled when put to the test, had failed him.

Groping on the floor, the scientist failed to find the flashlight.

Some of the new research also suggests why other scientists have failed to find such specialization.

If such a famous scientist failed to show any anxiety, there was no real danger to be feared and so they returned to their work.

He believes that many scientists and science educators fail to appreciate these differences.