Studying winds on Mars is very difficult. On Earth, we can easily use weather balloons or satellite tools to measure wind directly. But on Mars, there are very few places where scientists can put instruments — and the air on Mars is extremely thin....

The Prince of Wales has followed in his mother's footsteps with a visit to the Christ the Redeemer statue in Rio de Janeiro.Prince William stood in the same spot that Diana, Princess of Wales, was photographed in 34 years ago.He is on the third...