This Earth Day, stay in and explore the beauty, drama and spectacle of our natural world with 50 incredible natural history moments from BBC Earth. | BBC Earth

Earth Right Now: Year One in Review Over the past 12 months NASA has added five missions to its orbiting Earth-observing fleet – the biggest one-year increase in more than a decade. These five missions - GPM, OCO-2, SMAP, ISS-RapidScat, CATS -- are joined by 15 other mission currently in orbit and numerous airborne and field campaigns to provide new insights into how Earth works as a system. NASA's Earth Right Now campaign looks back on the past year of launches, data and science in this Year On