A researcher working in Papua New Guinea says he has discovered the world's smallest vertebrate, a species of ground frog that measures about 0.3 inches long. Christopher Austin says the frog, known as Paedophryne amanuensis, was one of about 20 previously unknown species that researchers discovered in New Guinea in 2009. Some experts say the male anglerfish is tinier, but the frog's discover argues that the "tiniest" crown should be based on the average species size.

Related Summaries