When fish snack on ‘ghost fleas,’ the neurotoxin they accumulate poses a risk to human fish eaters (Wim Van Egmond/Science Photo Library)

I ain’t afraid of no ghost fleas

Scientists are studying a strain of translucent, one-eyed zooplankton that comes out at night. "When you look at live ones under a microscope, they can spin their eye to look at you. You’d think the organism is possessed.”
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10 ways to help save the planet

From fake trees to showering with friends—these ideas might even save you money
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Canada’s sickest lake

Living, toxic goo is killing lakes the world over. It may be too late for Lake Winnipeg.