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The US President, Barack Obama, has announced plans to dramatically expand a marine reserve off the coast of Hawaii. The world heritage listed site, which encompasses the Northwestern Hawaiian Islands, is home to many rare and endangered sea creatures. The expansion will effectively quadruple the size of the reserve; bringing it to around 1.5m sq km.

Some exciting news now, because scientists say they've found a planet orbiting the closest star outside our solar system. And they say Proxima b, which is about four light years away, is a rocky globe that could have enough surface water to support life.

And finally, let's take you to a zoo in the American city of Chicago. Celebrations, but also a bit of mourning for a special cockatoo, who has died at the age of 83. Here's Cookie, a pink cockatoo, celebrating, in these pictures, his birthday back in June. He's believed to have been the oldest known bird of his kind. He arrived in the zoo in the 1930s. He retired a few years ago.