Hank gives a quick run-down of the reasons scientists think the land mammals of today are nowhere near the size of the largest sauropods. Some of them might surprise you!
If you liked this video, check out more videos about natural history and paleontology on SciShow's sister channel, Eons: https://www.youtube.com/eons
Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/artist/52/SciShow
Looking for SciShow elsewhere on the internet?
ACKSHUALLY Amphicoelias fragillimus is of doubtful existance since "it's bones were lost" and only drawings remain...simply put there's no proof that it's the largest -and before you try to prove me wrong just google the history of why that is the case.
So the confirmed largest species are the patagotitans.
Dinosaurs cold blooded....? The small ones could be similar to modern reptiles but the really big ones probably had some amount of body heat I would imagine.....
And Big Mammels could like Elephants adapt and produce less heat... why is body heat such a problem?
Dinosaurs were definitely warm-blooded, as were crocodiles. Look at the physiology of modern crocs and birds and the fact that birds are warm-blooded? And of course that other archosaur, pterosaurs, which were fuzzy, flying animals that could not possibly have functioned on reptilian-level metabolisms.
I say the reason why there's no giant insects is due to the oxygen level going down...down... really! You got the internet here...look it up! If I went in a time machine and bring a giant dragon fly back...it wouldn't survived our low oxygen levels.....
The only issue I have is that Amphicoelis fragillimus was only speculated to be that big from a single fossil. However, a better example to say was the largest dinosaur would be an argentinasaurus, patagotitan or even bruhathkayakosaurus. Which grew to an estimated 37m long, not nearly as long as Amphicoelis. This is why many palaeontologist doubt the legitimacy of the fossil, as all we have that remains are sketches from it and sizes as given by the palaeontologist at the site.
That's great, but what was NOT answered was: how do blue whales manage to be so big? I can get behind "they don't need the light bones because they're in the water" but what about long pregnancy and cooking themselves?
Amphicoelias never existed, it is no more real than Ultrasaurus.
The largest real dinosaur is Argentinosaurus. The Sauroposeidon (which is probably just a huge Brachiosaurus) is also among the largest fossils.
Use real science not hearsay.
High carbon? Ummmm might wanna check your data there bud. This is the hotest earths been and humans have introduced more carbon into the atmosphere then there has been for a long time. And yes, this has been proven. Look it up, NASA is a creditable source.
The class of drugs that Levitra, Viagra, Stendra, and Cialis belong to are called PDE5 inhibitors. They work by relaxing tight blood vessels, allowing more blood to surge into the penis and cause an erection, says Gregory Bales, M.D., an associate professor of urology at the University of Chicago.
The little pills do the trick for more than two-thirds of men with Viagra protects the heart (ED). They also work for guys who simply need them for a short time to get their “confidence back,” says Michael Eisenberg, M.D., director of male reproductive medicine and surgery at Stanford University.