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While some schoolchildren daydream about crushes during class, delicately inscribing their names in paper margins, others instead yearn to one day discover and name their own species for the cute boy at the corner desk. But they know little about the excess work involved in plant discovery

While some schoolchildren daydream about crushes during class, delicately inscribing their names in paper margins, others instead yearn to one day discover and name their own species for the cute boy at the corner desk.

Aw, look at the cute baby! Coloring in the lines! Riding that trike with ease! Looping those shoe laces into bunny ears! You're all grown up now, Twitter! Today, Twitter turns just five years old, but its accomplishments far outweigh that of any adolescent's. And while Ev Williams, Jack Dorsey, and Biz Stone are blowing out birthday candles on a cake made of black truffles and 140 ounces of gold, like any relative, we thought it the perfect time to highlight what the social network has achieved. After all, just look at how much the San Francisco-based company has to celebrate.

About 100,000 people have downloaded the social video sharing app in the last few days alone. And cute puppy clips aren't the only draw. With mobile-friendly max clip lengths of 15 seconds, Viddy's part Twitter, part Instagram, all the rage.

One of the risks in writing about endangered species is concentrating too much on the cute ones. But I couldn't skip covering the African black-footed cat ( Felis nigripes ) and the scientific breakthrough that could give this rare species an extra chance at survival. The African black-footed cat is one of the world's smallest and rarest cat species, not to mention one of the least studied.