Weird Things Whales Lost on Their Journey to the Sea

The video explores the evolutionary journey of cetaceans, highlighting the traits they retained and lost. It discusses the absence of melatonin and its effects on sleep, the adaptation to avoid blood clots during deep dives, and the loss of the PON1 gene, which affects their defense against certain toxins. These changes have allowed cetaceans to thrive in aquatic environments, despite new challenges.

What adaptations have cetaceans developed to cope with the challenges of diving?

How has the diet of cetaceans influenced their physiological adaptations?

What are the potential consequences of losing the gene paraoxinase in cetaceans?