The Future of Earth

While cetaceans in the seas may go extinct, it is not all ceteceans that will die.  Though things do not look good for most cetaceans, they will survive in rivers.  This is known as )))) Current river dolphins Things do not look good for current river dolphins.  Human activity seems like it may finish off the boto before too long.  A similar fate also happens to the other ones that may exist, except perhaps the one currently in the Indus,  which, while endangered, has managed to survive in a river which has been used by humanity since the bronze age, so should be relatively well adapted for water being used for irrigation. Beluga whales While current river dolphins may not survive, ripurian beluga whales do.  Specifically, the ones in the St. Lawrence river.  These belugas manage to get into the great lakes, and from there to the Mississippi river. Getting to the Mississippi Now, you might be wondering why there exist no records of whales of any kind i...

 The absence of humans from the world leaves open our former niche of persistence hunter, which was filled by various groups of  humans throughout history including the Tarahumara, basically, running after a wild animal such as a deer until it collapses from exhaustion, although this selection began only ~2mya.  With humans gone this niche will be filled.  In other places and climates are filled by wolves, dingoes, and african wild dogs.  These creatures already have certain adaptations useful to this, and, as such, are uniquely poised to take up this niches when we are gone. Some of humans' adaptations to this is our upright posture, making locamotion more efficiant and ability to sweat, granted by our lack of fur, allowing us to avoid overheating when people run long distances.  Of these, gradual loss of fur would be advantageous every step of the way, whereas the intermediate stages of centaurism would not grant quite as much of a benefit, so that would ...