Hong Kong protesters use a mesh network to organise
To communicate with one another, activists on the city's streets are relying on the free FireChat app to send messages without any cell connection
Rogue winds swept humans to last uninhabited islands
Shifting wind patterns could solve the mystery of how Polynesians colonised the most remote islands in the world
Earth's navel: Stare into an eye-wateringly big hole
The Siberian mining town of Mirny is home to the second-largest hole ever dug in the world, which produced a monster diamond with a ghastly name
Sunflower solar harvester provides power and water
An all-in-one, cheap, solar energy harvester can deliver power, clean water and heat to places that need it, quickly
Strange rock formation was "fracked" by ancient quake
A group of rocks in Colorado's Front Range that seems to defy the rules of geology could be among the rarest of formations on Earth
Behind the smile: What dolphins really think
They have been hailed as the second most intelligent animal on the planet, but could a soft spot for dolphins have led us to terribly misjudge them?
How to be genuinely yourself when always online
If you want to be free in a digital age, must you switch off your computer, ask two new books, The End of Absence and The Glass Cage
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