ABC News - Science 'Space pups' on Earth bred from mouse sperm stored on the ISS 2017-05-23T10:11:00.000000000+10:00 SPACE TRAVELLERS: Freeze-dried sperm that was stored in space aboard the International Space Station (ISS) for nine months has been used to produce healthy mice pups on Earth. Rapid greening of Antarctic Peninsula driven by climate change 2017-05-19T10:02:00.000000000+10:00 FAST CHANGE: The Antarctic Peninsula is not only getting warmer, it's getting dramatically greener with a sharp increase in plant growth over the past 50 years. Remote South Pacific island has world's highest level of plastic waste 2017-05-16T09:45:00.000000000+10:00 PLASTIC PILE UP: The beaches of World Heritage-listed Henderson Island are littered with more plastic debris than anywhere else in the world, a survey of the remote South Pacific wilderness finds. Early life on land may have thrived in 3.5 billion-year-old Pilbara hot spring 2017-05-10T10:57:00.000000000+10:00 ANCIENT EARTH: Ancient red rocks in Western Australia's Pilbara contain traces of a hot spring that hosted the earliest-known life on land 3.5 billion years ago. Cassini takes its first historic dive between Saturn and its rings 2017-04-26T10:02:00.000000000+10:00 HISTORIC MISSION: NASA's Cassini spacecraft begins the first of 22 historic dives between Saturn and its rings to collect valuable data about the environment, before it ends its mission by plunging into the planet in September. March for Science: Why did you march? 2017-04-22T11:09:00.000000000+10:00 MARCH FOR SCIENCE: Thousands of people marched in support of science - but what does that mean? Why asked some of the people who marched in Sydney. Key ingredient for life found spewing from Saturn's icy moon Enceladus 2017-04-14T06:45:00.000000000+00:00 ALIEN LIFE: The likelihood of one of Saturn's moons harbouring life has been boosted with the discovery by NASA's Cassini spacecraft of molecular hydrogen spewing from the moon's surface. Astronomers detect ultra-faint galaxy from the very early Universe 2017-04-10T23:17:00.000000000+00:00 DISTANT PAST: Astronomers discover the faintest galaxy ever glimpsed in the early universe, shedding light on a critical period of time just 700 million years after the Big Bang. Dreaming 'hot zone' found at the back of the brain 2017-04-10T23:15:00.000000000+00:00 DREAM ZONE: Scientists have found a "hot zone" in the back of the brain that is active during dreaming at all times, challenging long-held beliefs about what happens in our brains while we sleep. Stargazing Live viewers find four-planet solar system 2017-04-06T11:30:00.000000000+00:00 ALIEN SOLAR SYSTEM: Australian volunteer citizen scientists find four previously unknown planets orbiting a nearby star thanks to a crowd-sourcing project aired on the ABC's Stargazing Live.