A log of wood believed to be 50 million years old has been hauled up from below ground at Diavik diamond mine in the N.W.T. — a find that researchers say is remarkable but not uncommon.

New research from UVM suggests that fallen logs in streams are unsung climate heroes, locking up heretofore-unrecognized stores of climate-warming carbon.

(Diavik Diamond Mine/Facebook) Diavik says it’s talking about what to do with its wood specimens as it approaches closure A log of wood believed to be 50 million years old has been hauled up ...