Glacial retreat in the Canadian Arctic has uncovered landscapes that haven鈥檛 been ice-free in more than 40,000 years and the region may be experiencing its warmest century in 115,000 years, new 澳门开奖结果2023开奖记录 research finds. The study, published in the journal Nature Communications, uses radiocarbon dating to determine the ages of plants collected at the edges of 30 ice caps on Baffin Island, west of Greenland.