Un análisis químico de una área puede determinar cuánta contaminación hay en el aire. Pero hay un método mucho menos costoso que podría ayudar a las comunidades más pobres.
A chemical analysis of an area can find out how much pollution is in the air. But there's a much less expensive method that could help poorer communities.
Beyond the tropical waters of the island nation of Palau lies the Ngaraard Pinnacle, a much rarer kind of reef than its colorful coral cousin.
Mating snails stab each other with barbs to increase chances of paternity.
The forecast has been bad for domesticated cacao. But some environments in Peru might hold the key to the future of the world's sweet tooth.
Marine biologists need to count sharks to save them, but the common practice of using video cameras to record populations could be improved.