50,000 year old herbivore bones are best fresh for DNA amplification.
There are 50,000+ extant vertebrate species on Earth; are any of them sessile?
50,000 copies of An Inconvenient Truth were offered to the National Science Teacher's Association. Find out why they refused them.
The tentacles of Portuguese Man o' War can reach 30 feet in length; long enough to tangle a grad student.
11 lines of truth? You decide.
The number 1 most important medical advance since 1840?