It’s the canine equivalent of gentle v tough parenting – and there is no sign of a ceasefire. So what is the correct way to get man’s best friend to behave?

Name: Dog training wars.

Age: Puppy to 14 months, and beyond.

A new exhibition has trawled the Martin Parr Foundation’s archive to find these haunted images – revealing the UK as a place of fear and fascination

A striking transformation takes place along the coast of Qinqdao in autumn, when a native seepweed turns a brilliant shade of red.

The ‘red beach’ phenemon can be seen in the salt marshes and wetlands on the coast of China’s Shandong province, where the Suaeda glauca plant matures and absorbs water, changing it from green to crimson between September and November

The Guardian’s picture editors select photographs from around the world

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