The effects of global warming on parts of the polar regions are already obvious, but varied, hard to study, let alone predict, and geographically diverse, albeit with glo ...

Trees are earth's largest organisms and are also one of the planet's oldest inhabitants. Seasonal forests (unlike tropical rain-forest) the largest land habitats. A third ...

What would the earth be like without the sun? We'll never know, but the emperor penguins come the nearest to that experience, as they suffer through winter in Antarctica, ...