Eminent climate scientist David Karoly leads a Beyond Infinity panel discussion of mass consumerism, advertising, Earth's ballooning population, contraception and personal philosophy.
The Melbourne University professor and lead author for the UN's Intergovernmental Panel on Climate Change explains why we should act before it's too late.
Our weekly news round-up: GPS systems to adjust for Australia's 7cm-a-year continental drift; Porsche's 'Mission E' electric sedan to take on Tesla's Model S; Effects of long-duration spaceflight on humans; Interstellar message in a bottle; Possible class actions against MS for Windows upgrade tactics; Indian hacker exposes Vine source code; SwiftKey's data leak; Space Station's internet for the solar system; Australia's first digital census; One billion iPhones sold.