If the two clocks get out of step, proving that gravitation itself is weakening, it will bring great changes in many branches of science. Dr. Dicke points out that gravitation is what holds the ...

This clip will be relevant for teaching science at Key Stage 2 and Key Stage 3 in England, Wales and Northern Ireland or Second/Third Level in Scotland. A look at a selection of animals ...

The measles virus attacks long-lived immune cells, reducing antibody-mediated protection from other infectious diseases and casting a long shadow of childhood mortality.