Good week for UK athletics

Mo Farah got the UK cheering with his performance at the World Championships in Beijing. He won gold in the 5,000 and 10,000m race - which he has also done at the London 2012 Olympics and in Moscow in 2013. We now say he has the triple double (two medals for the same events, three times).

We also found out how long jumper Greg Rutherford is doing so well. He has installed a long jump pit in his back garden at home to improve his training. 

See crime author Agatha Christie in a new way

We are used to seeing photos of Agatha Christie, the world's best-selling crime writer, sitting at her typewriter. She spent a lot of time there, writing more than 80 novels about Hercule Poirot, Miss Marple, and other characters. A new exhibition of photographs celebrating the 125 anniversary of her birth shows Christie in a new way.

There are pictures of her roller skating, surfing in South Africa, and on a beach in Honolulu. 

The exhibition has been put together by Christie's grandson, Mathew Pritchard, who says she was very good at listening to people. He also remembers her dog, Bingo, which bit someone every time the phone rang. 

The exhibition is in London until September 6 and then in Torquay until 18 October as part of the International Agatha Christie festival. 

Scientists analyse Winnie the Pooh's favourite game

If you've seen or read Winnie the Pooh, the story about a bear who isn't very clever, you may have heard of the game Poohsticks. You may even have played it. Poohsticks is very simple: you and your friends throw sticks into the river off one side of a bridge then see whose comes out of the other side first.

Now engineers have been working on the game. They have found that a fatter, heavier stick works better. And VisitEngland have listed the best 12 bridged in England to play the game. 

1930s pubs get protection

Nineteen pubs built in the 1920s and 1930s have been protected by the Government so that they cannot be changed or knocked down. They were all built during as part of the "improved pubs" movement, which created nicer buildings to attract women and families. Before that, pubs were seen as places where people got drunk. 

The protected pubs are usually very big, with car parks and lots of fancy rooms and details inside. Some are built of brick, others have white plastered walls and black wooden beams to make them look very old. Now the government is looking at more modern pub buildings to choose which of these it should protect.