Travel is usually about escapism, beaches, skylines, flavors, sunsets. The world is changing faster than guidebooks can ...

一项发布在《内科学年鉴》（Annals of Internal Medicine）上的新研究发现，每天一次长距离步行比多次短距离步行更有利于心脏健康，特别是对锻炼量较少的人来说。 The study looked at more than 33,000 adults aged 40 to 79 in the UK who walked fewer than 8,000 steps a day.

The first images from Sentinel-1D show a range of landscapes, from Antarctica to South America, and European cities and ...

Warmer air makes glaciers speed up more and reach peak speed earlier each year, showing temperature strongly controls how ice moves.