"Biology is applied chemistry." - Anon.

Supplementary videos

Hydrogen is very reactive: Hindenburg explosion
Hydrogen is very reactive: balloon explosion (HHMI)
Antioxidants and free radicals: dangers of unpaired electrons
How microwave oven works: by disrupting hydrogen bonds
Water pulled up a tree due to cohesion
Birds dance on water due to surface tension
Hydrogen fuel cell with PEM technology
Electrolysis: Producing hydrogen from water
Peptic Ulcer: why 'medications to suppress stomach acid'?

Extra credit readings

• How lizards walk on water BBC News 11/24/04
• Why Toyota and GM Are Pushing Fuel-Cell Cars to Market MIT Technology Review 7/5/13
• Acid/Alkaline Theory of Disease Is Nonsense Quackwatch 1/11/09

Additional material

• Electrolytes: do you need these in sports drinks?