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Predation pressure, habitat decline and demonisation; Britain’s adder population is in serious decline. Fergus Collins meets the reptile champion fighting to save the UK’s only venomous snake.

These are the top cats of the internet, with huge online followings and heaps of charisma

Is ragwort dangerous to humans or animals? Learn what it is, where it can be found, its benefits for wildlife and the dangers associated with it in our expert ragwort guide.

These are the mega-dogs, who have taken the internet by storm with their canine charisma

How birds traverse thousands of miles – and why remote outposts like the Isles of Scilly become a lifeline if they lose their way

From train lines to power stations, motorways to Parliament buildings, are these megaprojects worth the money? You decide

These British species pay the ultimate post-coital price, with one ejaculating so hard its abdomen splits open

While some human foods are dog-friendly, others are highly toxic. Pet nutritionist Laura Crotch-Harvey has revealed her definitive list of human foods that are friendly for dogs.

We take a look at the dog breeds that are least likely to face health problems

Many cats and dogs can form calm, happy relationships when trust is allowed to build at their own pace

Splashing about in open water is one of life's great joys - but which animals might sink their teeth in?

How a forest that was once swallowed by sand and scarred by naval artillery became the perfect cinematic backdrop for Christopher Nolan’s Greek epic

PSDA Veterinary nurse Shauna Walsh debunks the myths of why dogs eat grass – and how to make sure the grass is safe for your dog to eat

Discover this tiny Hebridean island off the north-west coast of Scotland that's home to a football pitch like no other

Discover what takes place inside the chrysalis of one of nature’s most extraordinary transformations

Sunburn can be painful and uncomfortable. The experts from St John Ambulance explain how to treat it – and keep sunstroke at bay

The Christopher Nolan-directed ancient Greek epic has a number of surprising filming locations – including the crumbling ruins of a Scottish castle

From companions to ancient pharaohs to sled haulers in the Arctic, dogs have walked besides humans for many thousands of years. But which are the oldest dog breeds?

As the Bayeux Tapestry returns to Britain for the first time in 900 years, we reveal some of the most surprising facts about the 11th-century masterpiece.

Photographers are encouraged to submit their most spectacular pictures of weather