Day. we tens or even hundreds of metres per da . ~ ., ., tens or even hundreds of metres per da. ., ., tens or even hundreds of metres per da .~ ., ., . ,, . day. we are not talking about a few thousand years. — day. we are not talking about a few thousand years, 20,000 _ day. we are not talking about a few thousand years, 20,000 year- day. we are not talking about a few thousand years, 20,000 year old i day. we are not talking about a few. thousand years, 20,000 year old ice sheets, can you tell us more about how you did the research? we used data collected _ how you did the research? we us...