[wbill]

A study that appeared in Nature Magazine in 2003 found that 1700 plant, animal and insect species moved poleward at an average rate of 6 kilometers (about 4 miles) per decade in the last half of the 20th century.

So many points to discuss....I'll just pick one.

A specices (as a whole) moved poleward by a total of 20 miles in the past 50 years? How would you go about measuring something like that? And, how would it be relevant?

More Global Warming nonsense. James Hansen, irregardless of his credentials, is one of the larger Chicken Littles out there.

[firebrand]

It seems to me that would be fairly easy to measure: found at a certain new latitude, no longer found at another old one, ergo whole species has moved.