Animals

The Amazon's "ghost dog": the wild canid almost no one has seen, now being revealed by camera traps

The Amazon's "ghost dog": the wild canid almost no one has seen, now being revealed by camera traps

The nurse shark, the "gentle giant" that rests in piles and vacuums up its food

The nurse shark, the "gentle giant" that rests in piles and vacuums up its food

Do octopuses dream? The color changes during sleep that fascinate scientists

Do octopuses dream? The color changes during sleep that fascinate scientists