You write a message, and Mixcard sends off a postcard to your recepient with a QR code for them to get their mixtape.

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The only way to send a text message was to write a letter and slap a stamp on it.

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It tells how agents write their message using a Pentel Rollerball, then press it against a fresh piece of paper to transfer an invisible message.

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The site isn't designed to receive large caches of documents, so someone sending a message would have to write that they have documents they'd like to send, and then 100Reporters decides whether to provide that person access to transmit those documents.

CNN: See yourself as the next Assange? Good luck

That's the message of a trio of pediatricians, who write this week in the journal Pediatrics with a clarion call to other family doctors and child specialists: stay alert to the signs of psychological maltreatment.

CNN: Belittling kids as harmful as beating, study finds