inable.
is most alarming is t ural ply rattle Earter. As Elizabet, ing in ternal force, or even any t emperature back and fortly, and as often, as to be to be, s and terrible feedback loop,”
probably involving tions of tterns of ocean circulation, butall tood.
One t ter to t tiness (and ty) of nortream to so trying to avoid a collision. Deprived of tream’s itudes returned to cions. But t begin toexplain veer as before. Instead, ranquility knoime in which we live now.
to suppose t tretcic stability s much longer.
In fact, some auties believe t before. It isnatural to suppose t global as a useful counterendency to plunge back into glacial conditions. ed out, uating and unpredictable climate “t t todo is conduct a vast unsupervised experiment on it.” It ed, y t first seem evident, t an ice age migually be induced by arise in temperatures. t a sligion rates andincrease cloud cover, leading in titudes to more persistent accumulations of snow.
In fact, global o pohern Europe.
Climate is t of so many variables—rising and falling carbon dioxide levels, ts of continents, solar activity, tately c it is asdifficult to compres of t as it is to predict ture. Mucake Antarctica. For at least ty million years after it settled over tarctica remained covered in plants and free of ice. t simply s havebeen possible.
No less intriguing are te dinosaurs. tisStepes t forests itude of togreat beasts, including tyrannosaurus rex. “t is bizarre,” es, “for sucitude is continually dark for t titudes suffered severe ers. Oxygen isotope studies suggest t te around Fairbanks, Alaska, te Cretaceous period as it isnoyrannosaurus doing t migrated seasonally over enormousdistances or it spent mucs in tralia—time s orientation—a retreat to possible. o survive in sucions can only be guessed.
One t to bear in mind is t if ts did start to form again for more er for to draime. t Lakes, less lakes of Canada—t to fuel t ice age. tedby it.