Scientists have cited evidence that the practice of yoga may affect the human body in ways similar to antidepressants and psychotherapy.

CNN: Using downward dogs to treat depression

But in recent years, he has lobbied NASA extensively to get the agency to use him for geriatric research, helping to connect the space agency's researchers with scientists eager to see how weightlessness may affect human aging.

CNN: It's official: Glenn will return to space

The figure would represent around one in nine people on earth, according to current population projections, but would mainly affect the world's poorest people in Africa, Asia and Latin America, according to the authors of "Human Tide: The Real Migration Crisis, " produced buy the charity Christian Aid.

CNN: Climate change 'to create 1B refugees'

That means human-generated underwater noise has the potential to affect fish just as traffic noise affects terrestrial animals such as birds, say the researchers.

BBC: Earth News - 'Noise pollution' threatens fish

Human actions "will" affect the global climate, is changed to "might".

BBC: Climate chaos: Transcript