ABC News - Science Brainy bees learn to use tools by watching other bees 2017-02-23T22:55:00.000000Z TASK MASTERS: They may have tiny brains, but it turns out that bumblebees can not only learn to use tools by observing others, they can improvise and make the task even easier. Scientists discover seven Earth-sized planets orbiting nearby stars 2017-02-22T22:59:00.000000Z ALIEN SOLAR SYSTEM: Seven Earth-sized planets, some of which could harbour life, have been discovered orbiting a dwarf star in our own galactic neighbourhood. Organic matter discovered on dwarf planet Ceres hints at potential for life 2017-02-16T22:40:00.000000Z DAWN DISCOVERY: Simple organic molecules have been detected on the dwarf planet Ceres, adding to evidence it contains key ingredients essential for life. Pregnant reptile fossil suggests bird ancestors gave birth to live young 2017-02-15T01:00:00.000000Z REWRITING REPRODUCTION: The discovery of a fossil of a pregnant marine reptile has provided the first evidence that an ancestor of modern-day birds and crocodiles gave birth to live young. Even Earth's deepest ocean trenches contain high levels of pollution 2017-02-13T22:42:00.000000Z DEEPLY CONCERNING: Deep ocean trenches - considered the most remote places in the world - have levels of toxic, industrial chemicals 50 times higher than a highly polluted river system in China DNA reveals how pitcher plants evolved to become flesh-eaters 2017-02-06T22:52:00.000000Z DIY KILLERS: Carnivorous plants around the world all developed their killer habit in surprisingly similar fashion, according to a genetic study of distantly related pitcher plants from Australia, Asia and America. 'Platypus of microbiology' bacterium pushes boundaries of evolution 2017-02-02T00:02:00.000000Z EVOLUTION OF LIFE: A bacterium dubbed the "platypus of microbiology" is even stranger than first thought, with the discovery it contains structures normally only found in more complex cells. Scientists cook up material 200 times stronger than steel out of soybean oil 2017-01-30T23:17:00.000000Z MATERIAL SCIENCE: An everyday cooking oil has been used to make graphene in a lab - a development scientists said could significantly reduce the cost and complexity of making the super-substance on a commercial scale. Emeritus Professor Alan Mackay-Sim honoured for stem cell research 2017-01-26T07:32:00.000000Z 2017 AUSTRALIAN OF THE YEAR: Emeritus Professor Alan Mackay-Sim has been awarded Australian of the Year for stem cell research which has led to groundbreaking advances in the treatment of spinal cord injuries. Fossils of huge 'wolf-sized' otter unearthed in China 2017-01-24T02:33:00.000000Z GIANT OTTER: Scientists have unearthed fossils of an intriguingly large otter as big as a wolf that frolicked in rivers and lakes in a lush, warm and humid wetlands region in south-western China about 6.2 million years ago.