大象传媒

In an unguarded moment at Buckingham Palace, David Cameron claimed Nigeria and Afghanistan are two of the most corrupt countries in the world. Maggie Murphy from Transparency International says there is widespread corruption, but both countries are trying to change.

Plus, NASA says its now discovered more than 1200 planets outside our solar system, raising hopes of finding other life in the universe.

And two research groups are vying to be the first to create the hyperloop - a super-fast transit system that will take people the 381 miles from Los Angeles to San Francisco in just 30 minutes.