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Originally posted on 2020 Science, 25/8/09: Could using sunscreen lead to Alzheimer's, Parkinson's, or other neurodegenerative diseases?  The association seems far-fetched - given the amount of sunscreens, creams and lotions used every day, surely someone would noticed a link by now if it existed!  Yet a press release from the ...

Into the babble of conflicting and confusing terms surrounding nanotechnology, let me introduce another one: “wysinwig nanoparticles”—what-you-see-is-NOT-what-you-get nanoparticles.  It describes particles that have an annoying habit of revealing their true identity only after they have been painstakingly measured, monitored and ...

Painted metal roofs are cheap, convenient, and usually very durable.  But over the past two years, a rash of accelerated ageing has blighted pre-painted steel roofing in Australia.  And intriguingly the ageing—which affects the coating—seems to be localized to small patches, taking on the form of fingerprints, handprints and even ...