Birds' eggs show pigment and structural adaptations that let just the right amount of sun reach the embryos.
A lack of information about how many endangered cats live in the wild is hampering efforts, the conservation group WWF said.
The start of racing season begins with a spate of horse injuries for California racetrack.
The scaly anteaters could be eaten out of existence if illegal hunting and poaching continue.
The four-year-old male, who survived with nothing more than a torn nail, was struck by the vehicle in Queensland, Australia.
A newly discovered dinosaur species offers hints that feathers were much more common among the ancient beasts than once thought.
A massive hatching of mayflies wreaked havoc across Wisconsin, Iowa and Minnesota.
With only some 50 left in the wild, the animal faces extinction without captive-breeding programs in zoos.
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