Are they made of harder stuff?

I know a greek A&E doctor. She tells me greeks bleed like everyone else.

Seriously, riding a bike in Athens is tantamount to suicide. It doesn't help that most of them ride with their helmet hooked on their arm, and not on their head!

Rutted, slippery surfaces - check
Driving double the speed limit normal - check
Massive conjestion - check
No protective gear worn because of the heat - check
Lane discipline non existant (there are lanes?) - check
No patience drivers - check

suicide!