Climate scientists launch biggest polar expedition of all time

In this image, the research vessel Polarstern is docked and faces the camera nearly head on
The German icebreaker and research vessel Polarstern in Tromso, Norway, on Sept. 18. Photo: Rune Stoltz Bertinussen/AFP/Getty Images

Scientists from 19 countries, including the U.S., embarked on a 1-year, $155-million expedition on Friday to study how warming effects from climate change impact the Arctic region "now and into the future," the New York Times reports.

Why it matters: "We won’t succeed in accurately forecasting climate developments if we don’t have reliable prognoses for the Arctic," scientist and expedition head Markus Rex said in an interview on the polar expedition's website.

Photo from Greta Thunberg's 2018 climate strike shows massive growth over a year

This image is a two-way screen of Greta Thunberg sitting in a yellow raincoat and Greta speaking into a microphone.
Greta Thunberg. Left: Michael Campanella/Getty Images. Right: Reuters

On the left, on Aug. 2018, 15-year-old Greta Thunberg holds a climate strike with a sign reading "School strike for the climate" outside the Swedish parliament. Only a few other students joined her.

Driving the news: At right, Greta Thunberg, now 16, speaks to a huge crowd in Manhattan on Friday as millions of young people flooded streets around the world to demand political leaders take urgent steps to stop climate change. New York City announced its 1.1 million students were allowed to skip school to participate.