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Mars

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The recent return of astronauts Butch Wilmore and Sunita Williams from an unexpectedly prolonged mission aboard the International Space Station (ISS) marks yet another milestone in humanity’s evolving relationship with space.

Mars water still trapped underground: Study

The research team from California Institute of Technology (Caltech) and NASA's Jet Propulsion Laboratory (JPL) found that around four billion years ago, Mars was home to enough water to have covered the whole planet in an ocean about 100 to 1,500 metres deep; a volume roughly equivalent to half of Earth's Atlantic Ocean.

Hunger Myths

There is a knotty problem of defining hunger, subjectively and objectively, and differentiating it from starvation on the one hand and malnutrition on the other. Hunger literally means the physiological desire to consume food. But this subjective definition does not lead automatically to an understanding of the extent of food deprivation.