Can't Use Helmets in the Sun????
David Kerber wrote:
That doesn't mean the helmet
didn't reduce the severity of the injury, though.
Recognising that optimal performance removes no more than 10-15% of the
energy needed to fracture a skull.
--
Tony
"Anyone who conducts an argument by appealing to authority is not using
his intelligence; he is just using his memory."
- Leonardo da Vinci
|