If evolution is survival of the fittest, why should a young raven share a winter's worth of food with its unrelated rivals?

如果进化论是适者生存，为什么这个年青的乌鸦会和与它毫无干系的乌鸦一起分享冬天里难得的食物？

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But with Defoe around, Spurs were always a threat too and the England striker came close either side of extra-time half-time - once thwarted by young defender David Raven and then seeing his shot whistle past the upright.

BBC: SPORT | Football | League Cup | Tottenham 1-1 Liverpool