Trudy, a crazy bag lady, has taken upon herself the task of showing visiting extraterrestrials the variety of life on earth.

NEWYORKER: Search for Signs of Intelligent Life in the Universe

This provides the necessary variety of response because the task of conducting the electricity is taken over by the carbon black.

ECONOMIST: Wine-tasting will never be the same again

He has also held other roles with the cancer society, co-chaired the Surgeon General's Task Force on Cancer Health Disparities and filled a variety of capacities at the National Cancer Institute.

CNN: Conditions Q&A from CNN health

The sheer variety of known Hebborn fakes has further complicated the task of finding his undisclosed forgeries.

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So Mr Borlaug first bred wheat cultivars for rust-resistance, a ten-year task, and then crossed them with Norin, a dwarf Japanese variety, to produce a shorter, straighter, stronger wheat which, when properly charged with water and fertiliser, gave three times the yield.

ECONOMIST: Norman Borlaug

Bebo said it also worked with a variety of organisations, including anti-bullying groups, the Home Office internet task force on social network, and the Department for Education.

BBC: NEWS | UK | Wales | South West Wales | Teens arrested over web bullying