require

A year later, schools are required to begin phasing them out.

The contestants were challenged to pull a giant Trojan horse up a hill and through a series of gates that each required a special code, before eventually setting the horse alight.

The investigations required highly demanding supercomputer simulations that consumed millions of CPU hours on Frankfurt's "Goethe" supercomputer and Stuttgart's "Hawk."

The quantum interactions involved are very complex and require advanced understanding of how loop currents, quantum geometry, and magnetic fields work together -- knowledge that has only developed in recent years.

In the notice, the Care Inspectorate said failure to demonstrate compliance with any one of the improvements within the required timescale could result in it proceeding to make a proposal to cancel the home's registration.