![]() ![]() The observable, contemporary scientific view of the Earth as a rotating spherical globe, which flat Earth believers contest. Twenty-two images of the Earth taken from space by the DSCOVR satellite. Projections of the sphere like the azimuthal equidistant projection have been co-opted as images of the flat Earth model depicting Antarctica as an ice wall surrounding a disk-shaped Earth. For similar topics, see Flat Earth (disambiguation). But unlike in similar materials, the increased toughness doesn’t come at the expense of other beneficial properties like stiffness.Ĭraig says he hopes the findings will help extend the lifetimes of car tires and plastics, potentially limiting annual microplastic pollution.This article is about modern-day beliefs that the Earth is flat. This isn’t the first time researchers have used weak connectors to make polymers stronger. Each broken connection follows the path of least resistance but dodging the long polymer strands means breaking many cross-linkers, which requires more stretching force overall. The tear propagates through the easy-to-break cross-linkers rather than through the tougher polymer strands. The secret to the increased toughness lies in the path the tear has to take, Craig says. But the bulk material required more force to rip than they expected. ![]() When the team stretched the polymer spaghetti, the individual cross-linkers broke easily, as expected. Adding the weak cross-linkers to rubber could lead to tougher car tires. A rubbery plastic polymer with weak cross-linkers, shown on the left, requires more stretching force to tear than a similar polymer with stronger cross-linkers, shown on the right.
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