Traditionally the Moken are huntergatherers, spending much of the year fishing from covered boats known as kabangs, only returning to land to collect fresh water or seek refuge from seasonal monsoons.

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But what has not been clear before is whether the common ancestor was, like the sea cow, aquatic and therefore whether elephants have undergone a tortuous evolutionary journey from water to land (when their remote ancestors changed from fish to amphibians) then back to water again, before finally returning to the land.

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One resident, who identified himself only as Abdullah, told CNN that returning people are facing shortages in food, water and basic supplies for survival.

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Many involve creating task forces or crafting better plans to address such needs as restoring power, distributing food and water, checking on homebound people and returning patients to evacuated hospitals once they're running.

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The water powering the frames is recycled and filtered before returning to the plants.

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"Generally, Thames water quality has been improving - the fish are returning, " explained Bristol's Dr Nicholas Howden.

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Since returning from China another image has begun to recur alongside the Beijing water calligrapher.

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Hosing them with water now and then will chase them off and make them wary about returning for a while.

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After returning to and repressurizing the Lunar Module, we were able to drain and measure the remaining water in the backpacks to confirm the predicted.

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