Velcro is a brand name of fabric hook-and-loop fasteners. It was invented by a Swiss engineer who came up with the idea after examining the burdock seeds that kept sticking to his clothes. Velcro consists of a layer of hooks and a layer of loops which, when pressed together, form a bond that can be very strong: full-body hook and loop suits have been made that can hold a person to a suitably-covered wall. Research is being conducted to develop what kind of Velcro?
Back in the day
The Space Shuttle Challenger exploded seventy-three seconds into its tenth launch and with seven crewmembers on board. The explosion was caused by the failure of "O rings," rubber seals in the booster engines. The tragic event was captured on film and inspired candlelight vigils across the US that drew millions of people. Who was Christa McAuliffe?
Born on a day like today
MartÃ was an essayist, poet, and Cuban revolutionary. Active in the Cuban independence movement from boyhood, he was deported to Spain in 1871, returning in 1878. Exiled again for continued opposition, he fled to the US in 1880, from where he organized resistance to Spanish rule. He was killed in battle at Dos RÃos, soon after proclaiming the uprising which led to Cuban independence. MartÃ's "Versos Sencillos" serve as the lyrics of what famous song?