Uber returns to Barcelona with licensed service

Uber said Tuesday it was back in Barcelona with 120 professional drivers after it was forced out three years ago over the suspension of its service that enables unregulated drivers to ferry passengers for money using their ...

Mating induces sexual inhibition in female jumping spiders

After mating for the first time, most females of an Australian jumping spider are unreceptive to courtship by other males, and this sexual inhibition is immediate and often lasts for the rest of their lives, according to ...

A 'social control' system guarantees embryonic stem cell purity

A sophisticated system of "social control" operating between neighboring cells allows embryos to protect the purity of their pluripotent cell population, which is able to generate all body tissues. This system works through ...

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