JFK likeliest airport to spread disease

If you want to play it safe, avoid airports in New York, Los Angeles and Honolulu - they're the ones most likely to play a part in spreading pandemics.

Life on 'habitable' exoplanet probably couldn't spread

Any life on the 'super-Earth' Gliese 581-d is unlikely to make it off the planet and onto others within its solar system.

Twitter use spread through face-to-face 'contagion'

Ironically, Twitter use took off across the US bacause of traditional face-to-face interaction, an MIT study shows.