The fierce debate about smartphones and adolescent mental health rests on conflicting science. Researchers and technology companies must work to improve it.

Apr. 3, 2025 — New research shows that Sat Nav systems are helping keep older drivers on the roads for longer. The study reveals that over 65s with a poorer sense of direction rely more on help ...

\(power \ of \ a \ lens \ (D) = \frac{1}{focal \ length \ (m)}\) A lens has a power of -3.33 dioptres. Calculate the focal length and state what type of lens it is.

And there are lots of crochet kits, which make a great first project once you've learned the basic stitches. We show you the basic stitches step-by-step so you can be confident on your crochet journey ...