Before long, catalogs-previously just lists of items to be sold-began carrying new information: condition, provenance, even price estimates.

FORBES: Revenge of the Nerds

Mr Chavez has previously said that the prison system was neglected long before he took office in 1999.

BBC: Venezuela pledges action after 25 die in prison riot

That some populations have more of the long version of the serotonin-transporter gene has been noticed before, though the association has previously been made at a national, rather than a racial, level.

ECONOMIST: The genetics of happiness