A sloth clings to barbed wire as it crosses a road in Costa Rica. The sloth can be seen in the photo that won Wildlife Photographer of the Year.
Animals
Thousands of bumblebee catfish climb a waterfall in never-before-seen footage
'So weird': Ankylosaurus with 90cm spikes sticking out of its neck discovered in Morocco
What is the slowest animal in the world?
Pallas's cat: one of the oldest representatives of the cat family, which stands on its fluffy tail to warm its paws.
Earth's first primates evolved in the cold, not the tropics.
What is the difference between a llama and an alpaca?
Ancient predatory whale with big eyes and razor-sharp teeth was 'deceptively cute'
115-million-year-old dinosaur footprints discovered in Texas after devastating floods
No, blue whales won't go silent off the coast of California. Here's why.
Texas cougar genes are saving Florida cougars from extinction—for now.
Headless Chicken Monster: A Deep-Sea Sea Cucumber With Sediment-Eating Tube Legs
Why do cats and dogs eat grass?
The mystery of why starfish turn into slime has finally been solved — and it's not what scientists thought
'It looks like size really does matter': Males of four previously unseen tarantula species have record-breakingly long genitalia.
