Science News Roundup: Rare T-Rex skeleton to go under the hammer in Switzerland; For T. rex and kin, it was a stiff upper lip, not a toothy grin

rex and its relatives almost certainly had the dinosaur equivalent of lips - a new finding by scientists that challenges popular depictions of these predators as having big nasty teeth sticking out of their mouths.

Following is a summary of current science news briefs.

Rare T-Rex skeleton to go under the hammer in Switzerland

Millions of years after dinosaurs ruled the Earth, the skeleton of a giant Tyrannosaurus Rex was introduced to the public in Switzerland on Wednesday ahead of its auction next month. The giant carnivore, named TRX-293 Trinity, is expected to fetch between 5 million ($5.43 million) and 8 million Swiss francs ($8.70 million) when it goes on sale in Zurich on April 18.

For T. rex and kin, it was a stiff upper lip, not a toothy grin

They probably did not smile, frown or snarl, but T. rex and its relatives almost certainly had the dinosaur equivalent of lips - a new finding by scientists that challenges popular depictions of these predators as having big nasty teeth sticking out of their mouths. Researchers said on Thursday three lines of evidence - the skull and jaw anatomy in the group called theropods that encompassed all the meat-eating dinosaurs, the wear patterns of their teeth and the relationship between tooth size to skull size - all indicated the presence of lip-like structures.

(With inputs from agencies.)