How Trees Have Travelled in the Past?

Can we learn about our trajectory by looking at fossils? Yes, i think, you know, fossi s are often the best hints we have of the future. 12 thousand years ago, canada and much of alaska and much of northern europe were covered in vast ice sheets as big as the one that now is covering antarctica. Soa, that's a good example of how trees have travelled in the past. It takes a long time for a forest to shift its range. And so there's been a lot of worry on the part of scientists and conservationists going back 20 years now over whether many species would keep up.