Vital for energy.
Good food sources include red meat, beans, dried fruit, egg yolk, oysters and mussels.
RDA for iron is 8.7mg for men and 14.8mg for women. One in ten women are estimated to have low levels of iron.
Avoid taking more than 17mg daily as this could cause nausea, diarrhoea and block the uptake of calcium and zinc.
Tools designed to ensure computer code in smart cars does not crash has been inspired by hungry penguins.
The rounded sleeping capsules send guests drifting into ocean before arriving on desert island by morning.
Sitting on the saddle activates the part of the brain responsible for learning, a study has claimed.
Scientists are appealing for more people to donate their brains for research after they die.
Life on Earth may have arrived from Mars on an asteroid, scientists have claimed.
Lunar mission scheduled at the end of 2017 could find out if beer can be brewed on the moon.
A bottle used to teach children how far litter can travel ended up on Scottish beach after 8,700-mile journey.
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