Cyclone leaves 13 dead in Brazil

A cyclone which tore through southern Brazil has killed at least 13 people and forced thousands from their homes, authorities said Sunday.

Narwhals' hungry summers as climate warms

Narwhals may not be much good at hunting in summer, according to new research that warns the unicorn-tusked whales may be dangerously reliant on their ice-bound winter habitat that could "disappear" with climate change.

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