The deadliest mass shootings in US history

At least 50 people have been killed after a gunman opened fire at the Mandalay Bay Casino in Las Vegas - the deadliest mass shooting in the history of United States. IMAGE: A Las Vegas......

Brainwaves could replace passwords

The way human brain responds to certain words could be used to verify a person's identity, according to a new study which suggests that brainwaves may one day replace passwords. Researchers from......