While I was searching BBC yesterday, I found this interesting article that talks about the physics of why time only goes forwards. The explanations behind the science and fundamental laws of the universe, and how that relates to time, is fascinating but there's also some some cool ideas in the article that I think would be useful and fun for everyone, and particularly Group B. I hope you all enjoy!
http://www.bbc.com/earth/story/20150309-why-does-time-only-run-forwards