posted on Feb, 19 2013 @ 05:21 PM
Dolphins know to 'rescue' humans at sea because they have sonar; they can echo on the subject and realize it has lungs and do what they would do
with a dolphin in distress, take it to the surface.
The dolphin brain is larger and heavier than the human, and has more convolutions, which also increases it's computing power. The dolphin we see
today was fully evolved whilst humans were still tree shrews, and they once were land creatures; basically they have exited the sea, walked on land
and returned to the sea eons ago.
The amount of brain power dedicated to their sonar abilities is roughly equivalent to the amount we use for both eyesight and our hands; and sound
waves are distributed through water far more efficiently and for farther distances than in air. Dolphins sleep one half of their brain at a time;
they will leisurely swim in a circle with the outside eye looking out for trouble (connected to the reverse side's brain) and when done resting one
half of the brain, the entire pod will reverse course and proceed to sleep the other brain half.
In this mass sighting, either there was an abundance of food locally (and a strange lack of food in other places) and word got out, they are bugging
out in advance of the radiation plume cited above (which is right on schedule to hit the Pacific coastline NOW) or they were spooked in a certain
direction by some anomalous sound on the sea floor; there's definitely a volcano rift growing now off the Oregon coastline, and it's possible the
San Andreas is causing enough sonic disturbances that they've decided to get out of the way.
Please keep in mind that the larger whales can keep track of each other over the entire distance from the equator to the poles (lacking human
sea-noise making, one of our more terrorizing habits); the distance the dolphins can communicate with each other is shortened by the higher frequency
of their calls but it's on the order of many hundreds of miles, and they are certainly capable of relaying information over vast distances. They
have a language and it's highly sophisticated.