He’s up for any challenge.

David Hasselhoff claims he would have a hard time taking Viagra because it’s not a drug he can ever see himself needing.

“I am anti-Viagra,” the 59-year-old former “Baywatch” star said. “I am the Hoff.’’

***

It’s the closest most people will ever get to a royal burial.

A celebrity auctioneer is selling Elvis Presley’s original crypt inside the granite and marble mausoleum at the Forest Hill Cemetery in Memphis, Tenn.

The King was briefly interred there alongside his mother, Gladys, after he died in August 1977. Two months later, both were re-buried at Graceland. The original crypt has remained empty ever since.

***

If reindeer really can fly, the Finns have drones to corral them.

Reindeer herders in Finland are testing drone helicopters that look like flying barbecues to help them locate missing herds of the valuable livestock — which have a bad habit of wandering off.

The three-legged device has a round, red body packed with cameras and sensors.

***

A German teen who was working on a school project has become the first person to solve a mathematical problem posed by Sir Isaac Newton more than 300 years ago.

Shouryya Ray, 16, has worked out how to calculate exactly the path of a projectile under gravity and subject to air resistance, potentially paving the way for a whole new generation of weaponry.

The humble teen chalked up the discovery to “curiosity and schoolboy naivete.”

***

The world’s tiniest homage to the summer Olympics is a man-made, five-ringed molecule 100,000 times narrower than a human hair.

“When doodling in a planning meeting, it occurred to me that a molecular structure with three hexagonal rings above two others would make for an interesting synthetic challenge,” said Professor Graham Richards, who dreamed up the design later created in a Zurich lab.