The background of mammalian dolphins

Introduction Introduction The scientific infraorder Cetacea includes the whales, dolphins, and porpoises. These aquatic creatures are the most specialized of all mammals, with adaptations that allow them to spend their entire lives in water.

The background of mammalian dolphins

Continue Reading Below Advertisement We'd point out how terrifying it would have been to live in an era when killer whales could come flopping out of the ocean to munch on land prey, but we have a feeling the things would have been slow as shit.

For instance, the dinosaurs were so huge and terrifying that evolution decided to punish them for their hubris by turning them into birds.

It's difficult to imagine now, but the humble chicken once towered over the savannah as a Tyrannosaurus rex. Now we cut off their wings and make women in tiny shorts serve them to us as food. Continue Reading Below Continue Reading Below Advertisement Sometimes, though, the chickens are granted a nostalgic throwback to their badass past with a little help from modern science.

Inmad scientists working on chicken embryos managed to grow chickens with teeth by coaxing their DNA to recall their ancient evolutionary origins. Matthew Harris We didn't say they were good teeth.

After all, there were a lot of steps in between "building-sized lizards with murderous jaws" and "sad lumps of feathers that eat worms.

Stephanie Abramowicz via Phys. Continue Reading Below Advertisement That's Sulcavis geeorumthe million-year-old ancestor of modern birds, which nature wisely saw fit to eliminate from the gene pool and humanity has decided to tease back into existence by way of the world's most non-threatening species.

So modifying a chicken embryo to make it grow teeth just involves using a few tricks to bring out the dormant genetic traits that are still hiding in there.

Somewhere, a young writer has already started on his screenplay about hordes of genetically modified dino-chickens descending upon KFC headquarters to exact their violent revenge.

And the poster will be a big KFC bucket full of severed human limbs.Becoming a Marine Biologist.

Dolphin - Wikipedia

成 为一个海洋生物学家 Becoming a Marine Biologist, in Chinese! Becoming a Marine Biologist - In Spanish - en Espanol. Some of the most renowned evidence for evolution are the various nonfunctional or rudimentary vestigial characters, both anatomical and molecular, that are found throughout biology.

The background of mammalian dolphins

A vestige is defined, independently of evolutionary theory, as a reduced and rudimentary structure compared to the same complex structure in other organisms.

Via One of the first animal facts you learn in grade school is that whales and dolphins are mammals and actually more closely related to you than to the fish they resemble. Basic Facts About Dolphins Dolphins are highly intelligent marine mammals and are part of the family of toothed whales that includes orcas and pilot whales.

Part 1 Outline

They are found worldwide, mostly in shallow seas of the continental shelves, and are carnivores, mostly eating fish and squid. The deepest dive ever recorded for a bottlenose dolphin was meters ( feet).

This was accomplished by Tuffy, a dolphin trained by the US Navy. Nellie, the longest-lived Atlantic bottlenose dolphin in human care, died at age 61 on April 30, Nellie was born on Feb, 27, at Marineland.

Aug 24,  · Brucellosis is a zoonotic infection caused by the bacterial genus Brucella. The bacteria are transmitted from animals to humans by ingestion through infected food products, direct contact with an infected animal, or inhalation of aerosols.

Mammal - Wikipedia