1:52The story of Earth's first selfieOn December 24, 1972, a photo of planet Earth from NASA's last Apollo space mission helps mankind realise we're all in this together. Footage from the show "Generation X".ScienceBefore plants or animals existed, this 250,000-ton rock fell in the mud. Here's how we knowSpaceNASA sent a map to space to help aliens find Earth. Now it needs an update.EnvironmentWhat is the Autumn equinox? Here's what you need to know.EnvironmentHow to throw an (almost) zero-waste birthday partySpaceThe first person to see the 'Pale Blue Dot' image still has it stashed in her closetEnvironmentResolve to save the EarthSpaceA giant star is acting strange, and astronomers are buzzingScienceWinter solstice 2019 explained: When and why it happensSpaceBig volcanic bump unlike anything seen before found on the moonScienceWhy the New Zealand volcano eruption caught the world by surpriseSpacePhotos of the year: SpaceSpaceHow to see this week's intense 'unicorn' meteor stormScienceBizarre 'nesting doll' diamond found inside another diamondSpaceEarth's magnetic field flips more frequently than we thought: what does it mean for us?PhotographyDramatic photos of volcanoes in action around the worldScienceLast day of the dinosaurs' reign captured in stunning detailEnvironmentEarth's inner core is doing something weirdEnvironmentThis is now the world's largest volcano, geologists say