* Making 'Pavlov's Cockroach':
Scientists are trying to get cockroaches to drool on demand, as dogs did in a famous Russian experiment.
* Study finds our cells may get old with us:
A new finding could make it easier for scientists to study the aging process.
* 'Ongoing galaxy formation' detected:
Astronomers report finding a blob of gas around a spiral galaxy, evidence of the galaxy formation process.
* Robot maps ancient shipwreck:
Researchers have used an underwater robot to map remains of an ancient Greek cargo ship.