Facebook and Twitter may yield clues to preventing the spread of disease

Facebook and Twitter could provide vital clues to control infectious diseases by using mathematical models to understand how we respond socially to biological contagions.

Where did all the dwarf galaxies go?

Astronomers believe they've worked out why there are so many fewer dwarf galaxies than predicted: they're moving so fast that their gas is simply whipped away.

Clues for bacteria on Mars could be found in Río Tinto

Researchers at the Centre of Astrobiology have positively identified microorganisms living inside salt deposits in the acidic and ferrous environment of the Tinto River in Huelva, Spain.

How hard can Sudoku get? Mathematician has the answer

An Irish mathematician has demonstrated that there's a minimum amount of help necessary for a Sudoku puzzle to be solvable.