Female mice who have to compete for mates produce more desirable sons
Discovery of 24ft (7.3m) long, 8ft (2.4m) high predator changes our understanding of evolution of tyrannosaur family
Ricardo Portillo died after spending a week in a coma following a single punch to the head
Armchair thrill-seekers will be able to watch a high-wire walker cross the Grand Canyon, Arizona without a harness on television late tonight.
Hospital x-rays of Carole Lee Leazer-Hardman, 39, and Michael Condor, 35, showed the couple had several razor blades in their stomachs
As rock samples show evidence of life on the Red Planet, scientists and enthusiasts live like astronauts far closer to home, in the harsh terrain of Utah's desert
Curtis Allgier, a neo-Nazi and inmate of Utah Department of Corrections offered a oddly affecting plea when sentenced to life without the possibility of parole for killing a prison guard five years ago. He said: "Just because I've got tattoos on my face and I'm proud of my race, I'm not some violent monster."
For the chairman and chief executive of Murray Energy, an Ohio-based coal company, the reelection of President Barack Obama was no cause for celebration. It was a time for prayer — and layoffs.
Three American siblings have equalled a world record set in the 1960s by each being born on three consecutive leap year days.
ITV's rising star Tom Bradby tells Ian Burrell about his new political chat show, his relationship with the royal princes – and his other life as a movie writer
The backlash against two bills aimed at stopping online copyright infringement gathered pace last night, as eight US lawmakers announced they had decided to withdraw support for the measures.
A relationship under the microscope
David Usborne spends some quality time with the man who may prove the greatest threat to Obama
The Church of the Latter-day Saints is one of the fastest-growing and wealthiest religions in the world. But can the Mormons convince America to vote one of their number into the White House?
Guy Adams reports from Salt Lake City on why America is turning away from bills and back to an era when currency had real value
Uefa's flagship tournament has inspired copycat versions from Salt Lake to the South Seas. Glenn Moore charts the expansion