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Отворени данни в реално време за раждаемостта в България. Uncontacted Tribe Photographed in Brazilian Jungle. A previously uncontacted tribe has been found in Amazon jungle, with aerial photographs giving a glimpse of people who've had no known contact with anyone except their tribal neighbors.

Uncontacted Tribe Photographed in Brazilian Jungle

Taken by Brazil's Indian Affairs department, the photographs were released Jan. 31 by Survival International, a tribal-advocacy group. About 100 uncontacted tribes are believed to exist worldwide. Clive Thompson on Secret Messages in the Digital Age. Illustration: Jennifer Daniel In 440 BC, the Greek historian Herodotus first described a trick that spies used to send hidden messages.

Clive Thompson on Secret Messages in the Digital Age

They’d write something on the wooden back of a wax tablet, then cover the message with wax bearing its own message. If enemies intercepted the tablet, they wouldn’t suspect it contained anything strange. It’s called steganography: hiding one message inside another.