Scientists have learned to count entire emperor penguin colonies from space by spotting the rust-colored guano stains their crowds leave on the ice, a smear visible to a satellite camera that has let researchers track every colony on the Antarctic coast without sending a single ship

Penguin poop, visible from space, is now the most reliable way to monitor one of Earth's most inaccessible wildlife populations as their numbers face unprecedented pressure from climate change. The post Scientists have learned to count entire emperor penguin …