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New genetic analysis split Killer Whales into 4+ species

Turn on the Science Channel or Animal Planet, and until very recently Killer Whales (actually a type of oceanic dolphin) were described as a single unitary species. Now, genetic analysis indicates that in fact they are at least four species, perhaps more. This has important implications for species...

The key to the recovery of sturgeon stocks appears to be preservation of older female fish

Prior posts have noted the various strategies for assuring the recovery of depleted fish stocks, particularly the creation of no-fish zones. A recent study has found that in terms of restoring caviar-producing sturgeon the key is saving grown females, not supplementing the population with hatchery fish...

The Cambrian "Explosion" is looking less so

The Cambrian "explosion", as evidenced by the fossil record of specific aspects of the Burgess Shale, has been interpreted as representing the relatively rapid appearance of most major Phyla over the course of several million years. The fossils that began to "emerge" some 505 million...