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Indonesians collect old phones to help students get online

When a garbage collector came to Ghina Ghaliya's house in the Indonesian capital and asked if she had an old mobile phone his children could use to access the internet, it sparked an idea for a broader campaign to help students ...

A 4G network on the moon is bad news for radio astronomy

As you drive down the road leading to Jodrell Bank Observatory, a sign asks visitors to turn off their mobile phones, stating that the Lovell telescope is so powerful it could detect a phone signal on Mars.

Mobile phones help Americans encounter more diverse news

In recent years, we've heard a lot about "news bubbles" and "echo chambers," the idea that to validate their own worldviews, liberals read liberal news and conservatives read conservative news. The proliferation of partisan ...

Comparing canine brains using 3-D-endocast modelling

Based on digital endocranial cast models, the canine brain does not increase proportionally with body size. Researchers at ELTE Eötvös Loránd and Kaposvár University in Hungary reconstructed the surface morphology of ...

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Telephone

The telephone (from the Greek: τῆλε, tēle, "far" and φωνή, phōnē, "voice") is a telecommunications device that transmits and receives sound, most commonly the human voice. It is one of the most common household appliances in the developed world, and has long been considered indispensable to business, industry and government. The word "telephone" has been adapted to many languages and is widely recognized around the world.

The device operates principally by converting sound waves into electrical signals, and electrical signals into sound waves. Such signals when conveyed through telephone networks — and often converted to electronic and/or optical signals — enable nearly every telephone user to communicate with nearly every other worldwide. Graphic symbols used to designate telephone service or phone-related information in print, signage, and other media include ℡, ☎, ☏, and ✆.

This text uses material from Wikipedia, licensed under CC BY-SA