re,” 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.

    On t pory could see us melting a lot of ice rat. If all ts melted, sea levels of a ty-story building—and every coastal city in ted. Morelikely, at least in t term, is t Antarctic ice s. In t fiftyyears ters around it igrade, and collapses ically. Because of tty quickly—by beteen and ty feet on average.

    traordinary fact is t  knoeamy . Only one tain: we live on a knife edge.

    In tally, ice ages are by no means bad ne. tuous ric freser lakest provide abundant nutritive possibilities for  as aspur to migration and keep t dynamic. As tim Flannery ion you need ask of a continent in order to determine te of its people: ‘Did you in mind, it’s time to look at a species of ape t trulydid.