The man from a farm near Darvel in Ayrshire changed the world by discovering penicillin.
2 James Clerk Maxwell: His work on thermodynamics and electromagnetism puts him in the same league as Newton and Einstein.
3 James Watt: The engineer's improvements to the steam engine contributed to the Industrial Revolution.
4 John Napier: Mathematician known for the invention of logarithms.
5 James 'Paraffin' Young: He made his fortune by distilling paraffin oil and wax.
6 William Thomson, Lord Kelvin:
He developed the Kelvin Scale for measuring absolute temperature.
7 Joseph Black:
Chemist who was the first person to isolate pure carbon dioxide.
8 Robert Brown:
Botanist who discovered the random motion of particles suspended in a fluid.
9 James Dewar: A physicist best known for his invention of the vacuum flask.
10 James Hutton:
The father of modern geology freed scientific thinking from religious dogma.