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Health

HIV jumped to the US in 1970 - 10 years before it was spotted

The HIV virus was in the US in the 1970s before it triggered the nation's AIDS epidemic of the 1980s, a new genetic study has found

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Xudong Wang holds a piece of his energy-generating board in a lab

Technology

Energy-generating floorboard lights up 35 LEDs with one footstep

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Iceland drills hottest hole to tap into energy of molten magma

Earth

Iceland drills hottest hole to tap into energy of molten magma

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An e-reader screen the size of a Post-it note with a white border stands on a desk

Technology

E-paper display runs on office lights and never needs charging

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art installation

Humans

An enormous shape-shifting artwork – run by yeast

Culture

Capuchin monkey hits stone with stone

Life

Some of our Stone Age tools may just be crafty monkey throwaways

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Golden oldies: The pudgy dad hypothesis and why older men matter

Humans

Golden oldies: The pudgy dad hypothesis and why older men matter

Culture

Dizzying view of orangutan hunting for figs wins photo prize

Life

Dizzying view of orangutan hunting for figs wins photo prize

Regulars

A woman with large rolls of fat

Health

Overweight mothers give birth to biologically older babies

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Two whales swimming along, one of them has left a plume of faeces behind it

Life

Whales’ dung is the real reason we need to stop hunting them

Growing evidence that whales boost fish numbers and play a crucial environmental role will take centre stage at a major whaling summit taking place this week

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Health

Home abortions are safe – we should let women do it themselves

Analysis

Life

I saw humpback whales save a seal from death by killer whale

Features

Life

What do our natural laws really say about the world?

Culture

Technology

Exploding Samsung phone shows how risky lithium batteries can be

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