claim: Cordilleran Ice Sheet has a short history of a few years.
evidence: John-Anthony Cooney -LRB- born Johannes-Antonius Cooneybergson , 1982 in London -RRB- , often professionally accredited as The Jac-meister , is a British illustrator , animator , designer and stand-up comedian .. London. London. British. United Kingdom. illustrator. illustrator. animator. animator. designer. designer. stand-up comedian. stand-up comedian