Florida Museum field biologist Johanna Imhoff prepares to measure and tag
a bonnethead shark as biologist Jason Romine pulls in a 600-foot gill net.
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.
Reef-building sponges are giving up their long-held secrets.