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