A scan of a room service receipt seems to show that Stephen Paddock had a guest at the Mandalay Bay Hotel four days before he opened fire on a crowd in Las Vegas, killing 59 and injuring more than 500.

A scan of a room service receipt seems to show that Stephen Paddock had a guest at the Mandalay Bay Hotel four days before he opened fire on a crowd in Las Vegas, killing 59 and injuring more than 500.

More on Las Vegas, a demonic fashion show in a London church, a giant nude woman on the National Mall, child sacrifice in Uganda, cannibals in Russia, and more.

Oh -- DNA tests on the Nazca mummies show they're 100% human.

More on Las Vegas, a demonic fashion show in a London church, a giant nude woman on the National Mall, child sacrifice in Uganda, cannibals in Russia, and more.

Oh -- DNA tests on the Nazca mummies show they're 100% human.

More than 50 people were killed and 500 wounded in a mass shooting Sunday night in Las Vegas.  The only thing we know for sure is that the gunman, whether he knew it or not, was listening to a demon.

More than 50 people were killed and 500 wounded in a mass shooting Sunday night in Las Vegas.  The only thing we know for sure is that the gunman, whether he knew it or not, was listening to a demon.

Jonathan Cahn returns to talk about "The Paradigm" with Derek Gilbert and Josh Peck.

Jonathan Cahn returns to talk about "The Paradigm" with Derek Gilbert and Josh Peck.

Researchers at the Francis Crick Institute in London have used CRISPR-Cas9 "to disrupt the production of a protein called OCT4 that is important for embryo development."

The first-of-its-kind study used 58 embryos donated by fertility clinics no longer needed for in-vitro fertilization. But now that they've started down the slippery slope of experimenting on humans, how far will scientists go?

Researchers at the Francis Crick Institute in London have used CRISPR-Cas9 "to disrupt the production of a protein called OCT4 that is important for embryo development."

The first-of-its-kind study used 58 embryos donated by fertility clinics no longer needed for in-vitro fertilization. But now that they've started down the slippery slope of experimenting on humans, how far will scientists go?