The Umbrellas, a temporary work of art realized in two countries at the same time, reflected the similarities and differences in the ways of life and the use of the land in two inland valleys in Japan and the USA.
After a struggle spanning the seventies, eighties and nineties, the wrapping of the Reichstag was completed in June 1995. For two weeks, the building was shrouded with silvery fabric, shaped by the blue ropes, highlighting the features and proportions of the imposing structure.
In 1983, eleven of the islands situated in Biscayne Bay, Greater Miami, were surrounded with 6.5 million square feet (603,870 square meters) of floating pink woven polypropylene fabric covering the surface of the water and extending out from each island into the bay.
These days I am more interested in the reverse case [of Da Vinci's helicopter]: ideas that could have worked many centuries before they actually appeared. The economist Alex Tabarrok calls these “ideas behind their time”
Curious minds want to know why these ideas appeared so late — and whether there might be anything that would prevent delays in future. One explanation is that the ideas aren’t as simple as they appear.
The bicycle is not as straightforward an invention as it seems. To move from ox-hauled cart to human-powered bicycle requires smooth-rolling wheel bearings, which in turn need precisely engineered bearing balls. Modern steel ball bearings were not patented until the late 1700s, and demand from the 19th-century bicycle industry helped to improve their design.