Stuffed in a sports bag in Johannesburg, South Africa, the small pangolin was far from her natural environment. She’d been poached from her home and held without food or water for around 10 days, and now she was up for sale. In February 2020, wildlife traffickers brought her to an arranged meeting...

Flying back and forth over Cape Cod Bay, a survey plane spotted a half dozen of the world’s rarest creatures: North Atlantic right whales. Such sightings are good news. The species hovers near extinction—by one estimate, fewer than 360 remain. Each time researchers locate a whale, they take pictures...