Thagomizers

Choerosaurus dejageri, the permian therocephalian with a funny face.

deathly curious how good the average tumblr user is at distinguishing dinosaur skulls from non dinosaur skulls

Ord's Kangaroo Rat (Dipodomys ordii), family Heteromyidae, southern ALB, Canada

Kalakocetus aurorae was an early cetacean that lived during the Eocene, about 50-48 million years ago, in what is now the northwestern region of the Indian subcontinent.

It represents the (currently) most basal known branch of the whale lineage, with teeth that are transitional between the crushing herbivorous-omnivorous molars of the closely-related raoellids and the shearing carnivorous molars of later archaeocetes.

Only known from a lower jaw and teeth, its full life appearance is unknown — but based on the body proportions of other early cetaceans it would have been a roughly cat-sized animal, around 60cm long (~2'), possibly resembling a smaller version of its better-known relative Pakicetus. It was also probably similarly semiaquatic, wading into rivers to hunt fish and other small freshwater prey.

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yes with an exception: when kangaroos are on land, they use their legs together for hopping, but when they swim, they alternate which leg is kicking just like humans and dogs do!

so they CAN, they just don't unless they think they need to.

They were so differently proportioned, and some species grew so large, than hopping like a modern kangaroo was probably physically impossible for them, so researchers have proposed that they walked bipedally instead!

There are multiple delightfully cursed reconstructions of this behaviour which makes them look more like a person running around pretending to be a dinosaur than anything else

So they'd have been the opposite of modern kangaroos, prefering to walk by moving their legs independently but bounding with their legs synchronized if necessary like when a predator attacked.

yes with an exception: when kangaroos are on land, they use their legs together for hopping, but when they swim, they alternate which leg is kicking just like humans and dogs do!

so they CAN, they just don't unless they think they need to.

Western Diamond-backed Rattlesnake (Crotalus atrox)

Our fucked up dolphins

Our fucked up porcupines

Our fucked up snakes

This

A spotted hyena (Crocuta crocuta) with a prey carcass in Kruger National Park, South Africa