Siberian tame fox experiment and aggression

What happened before and after this story. Background events not previously covered were summarised by AI.

1. 1 Jan 1959Background

   Belyaev begins selecting tame silver foxes in Soviet Siberia

   In 1959 Soviet geneticist Dmitri Belyaev and Lyudmila Trut began breeding the tamest silver foxes, launching a famous domestication experiment.

2. 1 Jan 1970Background

   Siberian fox experiment adds a line bred for aggression

   Around 1970, researchers in Novosibirsk began breeding aggressive foxes alongside tame ones, creating two opposite lines for comparison.

3. 

   9 Nov

   Tame Siberian foxes have fewer 'aggression' neurons, a new brain study finds

   Decades of breeding friendly foxes in Siberia have revealed a brain difference linked to aggression. Whether it explains their tameness is still unknown.