"I know someone who has been to 85 countries. I asked him which country he'd like to visit again. He didn't even think for a ...

The code book : the science of secrecy from ancient Egypt to quantum cryptography by Singh, Simon, author Publication date 2000 Topics Cryptography, Ciphers, Confidential communications, Data ...

Researchers surveyed the DNA of more than 200 cats spanning the last 9,000 years, including ancient Romanian cat remains, Egyptian cat mummies, and modern African wildcat specimens.