the penguin

do u know that the Emperor Penguin encounters another stressful condition on deep dives —markedly increased pressure of up to 40 times that of the surface, which in most other terrestrial organisms would cause barotrauma. The bones of the penguin are solid rather than air-filled, which eliminates the risk of mechanical barotrauma. However, it is unknown how the species avoids the effects of nitrogen-induced decompression sickness.

While diving, the Emperor Penguin's oxygen use is markedly reduced, as its heart rate is reduced to as low as five beats per minute and non-essential organs are shut down, thus facilitating longer dives. Its haemoglobin and myoglobin are able to bind and transport oxygen at low blood concentrations; this allows the bird to function with very low oxygen levels that would otherwise result in loss of consciousness.

i wish i can be like the Emperor Penguin because they did not polluted the earth with low oxygen adoption respiration system~ and the male do hatchlings eggs!!!
father is cool~
for more info pls refer this link.