COWS EVOLVING TO BE HUGE(And Trees Evolved From Grass)? - Project Apollo(Cattle Seedworld)

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While probably not an inevitable endpoint of evolution, megafauna seem to be a constant in most environments. But on a planet of cattle, how would megafauna evolve, and what would they look like?

This is part of my seedworld series, Project Apollo. Seed worlds are planets that were 'seeded' with earth lifeforms, that are then left to evolve independent of earth in this new context. This can result in extreme diversification, reminiscent of Darwin's Finches, mammals post K-T Extinction Impact, or when vertebrates first came onto land. Serina, a natural history of the world of birds by Sheather888/Dylan Bajda and Tales of Kaimere by Keenan Taylor are two examples of popular seedworlds.

Without oceans as geographical barriers, cattle can freely migrate anywhere they want on Apollo's surface. This massive food supply might allow for cattle growing even larger than mammals on Earth.

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Paraceratherium was the largest land mammal that we know of, ever, at 4.8 metres (15.7 feet) tall. Its weight is estimated to have been about 15 to 20 tonnes (33,000 to 44,000 lb), according to wikipedia. Compare this to the average African elephant, 8.2 to 13 feet (2.5 to 4 m) tall, although I think some mammoths were more comparable in height to Paraceratherium.

The largest mammalian land carnivore ever to exist was a lot smaller. Andrewsarchus mongoliensis is estimated to have been 6 feet at the shoulder, and 12 feet long, although only the skull has ever been found. That'd still be terrifying to see, and breathtaking, but no where near as large as the biggest herbivores.

Of course, dinosaurs got a lot bigger. T. Rex was taller than an elephant.

I have no idea if the colors on the really big cattle are even possible.

I think the species name Cicadaformi was suggested for a species of grasshoppers in the same comment as Neotitanoptera, which I nearly went with for the actual family. Maybe that's the name of the specific species in the art?

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If you've got fanart you'd like shown in the series, post it in the r/speculativeevolution subreddit (   / new   ) and I'll probably see it. But don't flood the sub of course, and I can't guarantee it'll be in the vid.

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Original concept by reddit user Bteatesthighlander1

Credit to those who drew their respective images in the video, such as Keenan Taylor and Dylan Bajda. Most other images were drawn by myself, can be found on Wikipedia, or are protected by fair use. Some have been modified/edited.

♫Music is from Youtube's Creator Music and does not belong to me.