Yet another list of iPhone apps to trawl through though this one is perhaps more serious than most as it focusses on things environmental. From the Treehugger group it contains short reviews and links to a range of green apps including carbon calculators, Offset calculators, a range of metering and measuring apps amongst others. Whilst many may be of personal interest there are a number that may be also useful in the classroom context.
"It's as strong as steel and tough as a bulletproof vest, capable of withstanding the same amount of pressure it takes to turn carbon into a diamond. Scientists have discovered nature's newest, strongest material, and it comes from . . . a sea snail."