The expedition leader, Donald B. MacMillan, wrote that his dogsled team “covered 180 miles in five days, worked hard every day and did not receive one ounce of food.”
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.