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 Opinion The heat beneath our feetFor far too long it’s been overlooked, but geothermal energy from naturally radioactive hot rocks represents an abundant energy source right in our backyard.  The profit from obesityTo stem the spread of obesity, we must study the complex web of commercial interests and marketing strategies driving it.  Who’s afraid of the big bad toad?A new arsenal of weapons, such as toad-specific parasites and pheromones is giving a glimmer of hope in the toad wars.  Let's use seaweed as fuelThe environmental and social costs of producing biofuels on land can be avoided by farming seaweed, says Ricardo Radulovich.  The coming famineWhat's even scarier than global warming? Julian Cribb argues that feeding the global appetite in an overpopulated, affluent and resource-scarce world could be the scientific challenge of the era.  The missing link in Australian genomicsGiven top billing on the cover of Nature, the first Australian animal to be sequenced should have been a triumph for Australian science – but the majority was done overseas. Why did we miss the bus?  The key to innovationWhether you're digging a ditch or designing an aeroplane, innovation makes the task more efficient and competitive. So how do we drive innovation?  The sins of scienceScientists have received special attention this week in the Vatican's 21st century update to the seven deadly sins. But could these new pronouncements end up stifling important ethical debates, rather than advancing them?  U.S. election raises hopes for scienceWashington should use the new wave of optimism for science to drive policy-making rather than to boost political agendas.  Why conserve marsupials?Vast amounts of money and resources are ploughed into conserving Australia's native mammals – is it all worth it?  Dissecting BaliThe U.N.'s Bali climate change conference ended in drama last week – but is its outcome a blueprint for success or a roadmap to hell built on good intentions?  Where science meets artScience and the arts are partners in the messy search for truth. The spirit of seeking knowledge and exploration is precious to both disciplines.  A call to actionIf the CSIRO's latest climate report is not to become Australia's epitaph then our country must live up to its global responsibilities, and the following actions are required. 
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