Building better quantum sensors

Usually, a defect in a diamond is a bad thing. But for engineers, miniscule blips in a diamond's otherwise stiff crystal structure are paving the way for ultrasensitive quantum sensors that push the limits of today's technologies. ...

A new look at disordered carbon

When carbon atoms stack into a perfectly repeating three-dimensional crystal, they can form precious diamonds. Arranged another way, in repetitive flat sheets, carbon makes the shiny gray graphite found in pencils. But there ...

The historical roots of a contemporary groundwater crisis

For well over a century the immense biodiversity of the lands that constitute Spain's Doñana National Park has attracted the attention of hunters, nature-lovers, and natural scientists from across the Western world. Iberian ...

Why locking in subscribers can hurt businesses in the long run

Promotional offers for newspapers, gym memberships, internet and phone services, and other subscription-based businesses sometimes come with a catch: after a honeymoon period of reduced pricing, the business renews the membership ...

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