Florida Museum vertebrate paleontologist Jonathan Bloch holds the preserved skull of the 54-million-year-old primitive primate, Ignacius graybullianus.
Elephant populations continue to dwindle in Tanzania.
With proper safeguards, water currents can be harnessed out of sight.
Barely pulled back from the brink of extinction, California condors are still being poisoned by lead-based ammunition.
Vulnerable everywhere in the wild, lions already face regional extinction.