At Sanderson, Mary began to study more difficult subjects.

VOA: special.2010.06.27

More than 1, 000 subjects have been enrolled in the study for more than a year and over 550 subjects for more than two years.

FORBES: BioSante's Pollyannish Press Release

But fewer students want to study humanities subjects: English departments awarded more bachelor's degrees in 1970-71 than they did 20 years later.

ECONOMIST: The difficulties of an American doctoral student

Ginkgo is a top-selling herb and has been hailed by some as a memory-booster, but the new University of Pittsburgh study found it didn't help prevent Alzheimer's or other forms of dementia in more than 3, 000 elderly study subjects.

CNN: Five ways to keep Alzheimer's away