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 Opinion Mass hysteriaFrom wild speculation in financial markets to believing that aliens are visiting us, humans are prone to all sorts of personal and mass delusions - and have been for centuries.  Happy 40th birthday, Internet!In 1969 a UCLA team sent the first message over ARPANET, the computer network that later became known as the Internet. Since then it has fundamentally changed humanity.  Oil or orangutans?Illegal logging and palm oil plantations are destroying the forests of Borneo and Sumatra. We all have a part to play in resolving this, says Louise Boronyak.  Why high-speed trains are vital for AustraliaA zero-emissions, high-speed train network linking Australian cities, would be visionary, nation building and go a long way to stemming our greenhouse gas emissions.  Bumper brainsScience can help us stretch the limits of the human mind: but should we embrace brain enhancement, despite the risks?  Green genesIf we choose to steer clear of GM agriculture, we risk running out of space to feed the world, and destroying more and more arable land.  Enough climate science, now for the politicsScience can prove global climate change is happening, but it won't tell us what to do about it, says professor of climate change, Mike Hulme.  Stone Age instincts, modern emergencyCould it be that our genes and evolutionary heritage are responsible for our failure to tackle climate change?  Wake-up call for scienceIs science inherently illogical, because it relies in part on assumed theories that reach beyond what we can ever observe?  Beware the spinal trapRead the article that got Singh sued by chiropractors: Some practitioners claim it is a cure-all, but research suggests the therapy has mixed results and can be lethal.  Why a carbon tax is betterWhy create a complex new market for emissions trading, asks Alan Finkel, when a carbon tax would be simpler, fairer and deliver immediate benefits for the environment.  Space Week: Mandate of heavenAstronomy and space exploration has made a critical contribution to society, not just in accelerating technology, but in giving us important clues to problems on Earth.  Space Week: Deciphering Apollo's footageAs the Apollo project took off, Tony Klein, a University of Melbourne physicist, was thrown into the spotlight to provide commentary for huge TV audiences. Forty years later, he recounts his experience.  Future shockOn a clear and warm night years ago, looking up at the beauty of a full Moon rising, my grandmother confided in me: “You know, they didn’t really go to the Moon.”  Terminator Salvation: should we fear self-aware machines?The new instalment of the Terminator series continues the battle between humans and Skynet, the global computer network with its increasingly sophisticated fleet of terminators. 
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