Bloomberg: Three British explorers are testing radar that measures ice thickness and communications equipment ahead of a 100-day scientific mission to the North Pole, where they aim to collect the biggest set of sea-ice data ever recorded. During their polar quest, the adventurers will carry out 50 types of measurements to help scientists understand the effect global warming is having on Arctic sea ice, expedition leader Pen Hadow said in a telephone interview from Broughton Island in the …