Around 4,500 years ago, ancient engineers and workers terraced the little island in the Cyclades archipelago in the Aegean Sea, creating a sort of step pyramid. They then imported hundreds of tons of gleaming white rock from the nearby island of Naxos, creating a bright outdoor shrine where early Greeks performed rituals.
Billions of US taxpayer dollars have been invested in Africa over the past 15 years to improve care for millions suffering from the HIV-AIDS epidemic; yet health systems on the continent continue to struggle.
From various magnetic tapes, floppy disks and computer hard disk drives, magnetic materials have been storing our electronic information along with our valuable knowledge and memories for well over half of a century.
By designing a solid electrolyte that is rigid on one side and soft on the other, researchers have fabricated a lithium-metal battery that completely suppresses dendrite formation — a major safety hazard that can cause fires and shorten battery lifetime.
Researchers from the University of Minnesota College of Science and Engineering have found yet another remarkable use for the wonder material graphene — tiny electronic ‘tweezers’ that can grab biomolecules floating in water with incredible efficiency.