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 Cosmos Magazine Darwin at 200: The importance of dangerous ideasIt took courage to challenge society, the certainties of life in Victorian England and his own faith: but Charles Darwin did it, however reluctantly, because he knew he had found a greater truth.  Darwin at 200: The origin of a theoryWas Charles Darwin the genius behind the greatest revolution in science, or did he merely state the obvious?  Oceans of acidAs global warming wreaks havoc on coral reefs, evidence is mounting that another problem caused by carbon dioxide is an even bigger threat. But is it too late to fix?  Cosmic cannibals: the hunt for supermassive black holesIn the chaotic core of our Milky Way galaxy hides a ravenous cauldron of annihilation: a supermassive black hole. We follow astronomers on the hunt for new insights into these mysterious objects.  Speed demon: the scramjetWith continuing tests planned for the Australian outback, the 8,000 km/h scramjet is edging towards reality.  Tomb raidersArchaeologists are turning to particle physics to probe deeper into ancient structures for hidden knowledge and treasure. The key to it all is a curious particle, the muon.  Maps highlight malfunctions in the mindAdvances in brain scanning are allowing psychiatrists to move from cautiously diagnosing symptoms to actually seeing the underlying malfunctions of the mind.  Doomsday: Five catastrophes that could wipe out civilisationModern civilisation may be the most advanced in history – but it could still be toppled by calamity like so many before. Here are some of the more likely dangers that might take us to the brink – or beyond.  Dawn of the robotsThey're already here – driving cars, vacuuming carpets and feeding hospital patients. They may not be walking, talking, human-like sentient beings, but they sure are clever… and a little creepy.  Orbital express: here comes the space elevatorForget rockets - advances in nanotechnology may soon make a trip into space as easy as riding an elevator.  Birth of the Moon: a runaway nuclear reaction?How the Moon arose has long stumped scientists. Now Dutch geophysicists argue that it was created not by a collision, but a runaway nuclear reaction deep inside the Earth.  Amphibian annihilationFrogs are dying, and until recently, no one knew why. We look at the little understood fungus that's assaulting amphibians, and the efforts to rein it in.  A heated debateAmidst doubters, hyperbole and impassioned talk of swindles, Robyn Williams suggests climate change sceptics are asking the wrong questions to start with.  Magical mystery tour: the Pioneer anomalyIt's had scientists puzzled for years – why are some space probes slowing down, but not others? While the effect began with the Pioneer spacecraft, it seems to be spreading.  Nicotine: can it save your brain?Is it a scourge on society or a blessing in disguise? Public enemy number one may soon be a treatment for cognitive diseases. 
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