Bang Goes the Theory - Put science to the test

Good grub guide

Liz cooks up some nutritious but surprising dishes. It's worth watching just to see Dallas squirm - scorpion and locust blinis, anyone?

Dr Yan's electro magnet

Dr Yan makes a powerful electro magnet by wrapping copper wire around pieces of iron and attaching a small battery.

Perpetual problems

Jem explains how the law of conservation of energy means that perpetual motion machines are doomed to fail.

Jem's hybrid rocket sled

Jem builds a hybrid rocket ten times more powerful than he's ever done before, and launches it down a 200 metre railway track.

Hybrid rocket extra

Hybrid rockets are ingenious but dangerous. See how Jem's was built and why toffee is a better fuel than pork pies.

Nuclear fusion interview

Can nuclear fusion solve our energy problems? Dallas speaks to plasma physicist Professor Nick Braithwaite to find out.

Dallas' trapeze leap

Dallas braved the trapeze to help illustrate nuclear fusion, but did he dare fly through the air?

Testing Jem's rocket

Things don't go to plan as Jem tests his hybrid rocket at the University of Hertfordshire's special facility.

Liz left in pieces

Ta daaa! Jem and magic fan Dallas have sawn Liz in half, but that's only the start of her problems.

Scrambling speech

Liz meets Dr Joe Devlin and uses 'transcranial magnetic stimulation' to scramble his mind and speech.

Jem versus spider

He's scaled tall buildings and flown a water powered jet-pack, so Jem's not scared of a little spider, right?

Fresh spider silk

Jem calms down enough to delicately extract silk from a spider by hand (no spiders were hurt in this process).

Do you have all the answers?

Dr Yan asks for your help answering science questions in the Ask Yan section of this website.