Remote archipelagos teeming with sharks aren't as pristine as they seem

When swimming in the waters of the isolated Chagos archipelago in the Indian Ocean, a half-dozen sharks would sometimes surround Francesco Ferretti. 

"You are in another world," said Ferretti, a marine ecologist at Hopkins Marine Station of Stanford University. "You feel like you're in one of the last remaining paradises of the planet."

The medium-sized reef sharks here are harmless (to humans). The coral is vibrantly colored. The water pure.  

And to a large degree, it’s an illusion.

“When you see these places you think there’s less human impact,” said Ferretti in an interview. “However, things are not so simple.” Read more...

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