Help your child practise recognising numbers, counting, sequencing and much more with this educational game!

In this top graph of the red wiggly line, we're looking at the ground velocity in essentially metres per second. So, that's the velocity that the ground is vibrating up and down.

Recent work by Marcus, Spielman and Srivastava proves the existence of bipartite Ramanujan (multi) graphs of all degrees and all sizes. However, that paper did not provide a polynomial time algorithm ...

To participate, submit your response here by Aug. 1 at 9 a.m. Eastern. This week’s winners will be announced by Aug. 12. By The Learning Network Eight challenges that invite teenagers to engage ...