slipperier

"Adult platypus have no teeth, though juveniles have rudimentary molars. Just when and why adult platypus lost their teeth after nearly 100 million years is a mystery we think we have solved. It may have been competition with the Australian water rat, which arrived in Australia within the last 2 million years, which caused platypus to seek out softer, slipperier food best processed with the leathery pads that adults use today," Professor Flannery said.

The necessary abstraction that comes with any discussion of time makes the potential takeaways even slipperier: In one section, Odell invites us to “halve time,” to “make a cut in chronos and hold the past and the future apart as much as hope will allow,” pointing to “chronos,” the ancient Greek word for linear time.

He also said the ice surface was slipperier than during visits on sunny days in previous years.

The iPhone SE is slightly taller, wider, and heavier than the Mini — not to mention slipperier with its rounded corners.

Over time, shampoo, soap, conditioners and other products can build up and make the tub slipperier than it used to be.