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Professor Hartley reveals how, despite animals' attempts to destroy plants by eating them, plants are winning the war.
Animals only manage to eat around a fifth of the available vegetation and eating plants isn't as easy as it looks; they have developed ingenious ways to fight off their enemies, from poisonous chemicals to spines and stinging hairs.
Some of these weapons are useful to us - many of our most important medicines were originally discovered in plants - but others can do us serious harm. Even grasses, which look deceptively easy to eat, contain silica that makes chewing them like having sand in your sandwiches.
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On TV
First Shown
| Date | Time | Channel |
|---|---|---|
| Monday 21 December 2009 | 7PM | More4 |
Last Shown
| Date | Time | Channel |
|---|---|---|
| Monday 21 December 2009 | 7PM | More4 |
