Pando in Utah looks like a forest of separate aspen trees. What is it actually?

The answer

Pando is a single male quaking aspen clone: tens of thousands of stems connected underground across about 43 hectares (106 acres), weighing on the order of 5.9 million kg (13 million pounds). Individual trunks die and regrow, but the root system is one organism, among the heaviest living things on land.

Correct answer: One giant clonal organism sharing a root system