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Plants with Family Values

When people say, "It's a jungle out there," they generally mean that the world can be cold and heartless. Yet it turns out that a literal jungle may not be so uncaring after all. A team of Canadian scientists has found that some plants recognize close relatives and help them.

ByAnna RothschildNova

National corporate funding for NOVA is provided by Draper. Major funding for NOVA is provided by the David H. Koch Fund for Science, the Corporation for Public Broadcasting, and PBS viewers.