Scientists are studying bats and their use of echolocation to learn more about how bats process information to understand and adapt to the world around them. Echoes of hunting They detect and catch their targets through echolocation, or biosonar, the animal equivalent--and precursor--to man-made sonars. How to see what whales hear: biomedical imaging reveals new insights into marine mammal ears
The faster repolarization of the cardiac action potential causes the tenting of the T waves, and the inactivation of sodium channels causes a sluggish conduction of the electrical wave around the heart, which leads to smaller P waves and widening of the QRS complex.
inverted T waves is a sign of ischemia (decrease in amount of O2 perfusing the myocardium which can lead to chest pain) It is abnormal for your age but it isnt a death sentence more tests should be done to determine the causation. Inverted T waves can also signify Left sided hypertrophy which is an increase of the size of the left ventricle.