You can't understand depth of science, unless you challenge the published scientific data.

“Compression is a tremendous challenge. Five paragraphs on a topic is a lot for all but the most important issues.”

“Every track has its own design. It has to be fun, but it also has to be challenging.”

“Anyone can teach the most motivated students. It's the challenged we worry about.”

“We will do everything in our power to support both them and their daughter in the challenges ahead.”

When we begin to love and care for each other, we will share our challenges.

“The challenge the mobile content industry faces is to similarly engage a higher percentage of older consumers.”

“There are some challenges we deal with, primarily people management more than bird management.”

“I didn't think they would beat us, but I thought it would be a bigger challenge.”

A challenge only makes you stronger, wiser and a better person than you was yesterday.