This small but vital amount of iron is crucial for oxygen transport and numerous enzymatic reactions.
Friction can generate immense amounts of heat, as evidenced by meteoroids burning up upon atmospheric entry, where air resistance converts their kinetic energy into thermal energy.
James Prescott Joule
Circoviruses are among the smallest known viruses, measuring only about 20 nanometers in diameter, and possessing extremely compact genomes that code for just two proteins.
The phenomenon of electrical resonance, where circuits respond strongly to specific frequencies, is fundamental to radio tuning, wireless communication, and many electronic filters...
Heinrich Hertz, Nikola Tesla
A 'slipstream' created by a leading vehicle reduces air resistance for a trailing vehicle, which is why cyclists and race car drivers 'draft' behind others to save energy.
Chickens are known to be highly tetrachromatic, possessing four cone types (including UV), and have excellent color discrimination, important for foraging and mate selection.