The mighty oak tree is an invader from the North, like the sometimes fearsome Vikings commemorated in Led Zeppelin’s ‘Immigrant Song’. North American oaks trees evolved first in the temperate zone, diversified into red and white oak groups, and then moved south into Mexico. There, oak species diversified further, with more than 150 extant species … More The White & Red Oaks From the North
In what are now the Northern coastal oceans started getting greener ~65 million years ago, around the time when most dinosaurs went extinct. A distant relative of grasses was put on the evolutionary path to colonize the oceans. This new colonizer may have been the result of something plants routinely do to form new species: … More A Flowering Plant Under the Sea.