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NASA astronauts successfully complete first ever all-woman spacewalk

Christina Koch and Jessica Meir completed the first spacewalk with an all-women team. Since cosmonaut Svetlana Savitskaya became the first woman to do a spacewalk in 1984, women have participated in 42 spacewalks.

U.S. NASA announces world’s first-ever all-female spacewalk

On March 29, Anne McClain and Christina Koch will leave the relative safety of the International Space Station for a spacewalk to upgrade the craft's batteries - the first-ever to be all-female.

Earth has more tree and leaf coverage now than in 2000, thanks to China and India

According to U.S. NASA, there are now more than 2 million sq miles of extra leaf area per year, compared with the early 2000s €“ a 5% increase. The greening effect stems mainly from ambitious tree-planting and intensive farming in China and India.

U.S. NASA’s Mariner 9 becomes the first articial satellite of Mars

Mariner 9 was launched successfully on May 30, 1971, and became the first artificial satellite of Mars when it arrived and went into orbit.