Earth, handout photo. 地球, 資料照片

In this handout photo taken from the International Space Station, the Earth is seen reflecting light from the sun.
PHOTO: ESA VIA GETTY IMAGES/ALEXANDER GERST
White House To Launch National Microbiome Initiative To Study Earth’s Teeming Microbe Communities
http://www.ibtimes.com/white-house-launch-national-microbiome-initiative-study-earths-teeming-microbe-2368483

www.bbc.co.uk