科学家们说，近年来，南极野生动植物暴露在紫外线辐射中的时间有所增加，原因是臭氧层空洞在南极地区上空的时间更长了。臭氧层是地球上层大气中的气体保护屏障。 The ozone layer is healing, but it'll take until about the end of the century to restore completely. In Antarctica, the ...

On the road to becoming a global battery platform E-mobility, drones, robotics, and artificial intelligence are megatrends.

The park’s human history adds another layer of interest to your visit. Established in 1902, Big Basin holds the distinction of being California’s oldest state park, created at a pivotal moment when ...