You know, the beaches I've been to have enough drift-wood that I'd never even thought imagine any other way for iguanas to travel across the sea besides hitching a ride on an uprooted tree, but now you have graced me with the lovely mental image of iguanas building tiny canoes. It's adorable. Thank you :)
@@christelheadington1136: I remember that guy! He never really got as big a following as his contemporary, Wolfman Jack. "Harry", as us fans liked to call him, was more of a cult figure, especially to the college kids of St. Loony-Up-the-Cream-Bun-and-Jam University (Tick tock, Melting Clocks!).
@@sdfkjgh -I just got your reply. Funny that I'm watching the "Quantum Leap" pilot on TV, he's in 1957 and the radio is playing trough most of it.(No DJ yet).
that isn't what he said though and there's clearly an edit between him talking about the earliest dates for Gondwana and marsupials. You can't blame the guy for the edit or your leap to outraged smarty pants. You can't reason with idiots so I'm not sure why I'm wasting my time.
@@meadow-maker outrage? in any case, gondwana is an oversimplification when it comes to marsupial migration anyway. it had already broken up by that point aside from antarctica and australia, with likely just an island chain tying that to south america. plus an even wider gap i don't see him mention still between north and south america.
Marsipuals in the late precambrian around 600 million years ago (4:22)? I think a mixup in the script slipped through the cracks. The precambrian barely had fish, there definitely weren't any land vertebrates yet. Still a fun video, It happens to the best of us.
The information SciShow is passing to you in this show is wrong. During the Pre-Cambrian, not only there were NO fish or nothing but sponges, but also Gondwana was not even formed ( let alone Pangea ) and there was not even life on land ( let alone marsupials that could run around Gondwana ). Shame on SciShow!
@@ExtremeMadnessX According to Wikipedia, marsupials were even later to Australia than that, via Antarctica only 35 Mya en.wikipedia.org/wiki/Marsupial#Evolutionary_history
According to true science, during the Pre-Cambrian, there was no multicelular life apart to the Ediacaran living beings ( similar to sea sponges ), Pannotia was the name of the land mass that was breaking up by then and Gondwana was not even formed until the Carboniferous!... What SciShow is showing here is one of the most false information everyone has ever had the chance to get!
The part on avian dispersion of _fish eggs_ is a new one for me, pretty hardcore! Also pretty sure you got something wrong about the range and time frame for marsupial dispersion, I'm getting that Australian marsupials diversified about 50 Mya and probably rafted the gap between Antarctica and Australia and probably all diverged from a common ancestor of the Monito del Monte.
Yeah that got me too because i always wondered how freshwater fish spread out. Same species but different lakes and river.and even small stream on high altitude that been seperated by a high waterfall but still, fish exist there
I thought birds transporting fish eggs was a well known fact. I've had someone explain that to me some twenty years ago. They were talking how all you need is to set up a body of water and the birds will just carry the eggs in on their feet and in their feathers though.
Years ago I read a wonderful story about an independent trucker who delivered his cargo to a northern state (Minnesota if I remember correctly) in the month of December. He was supposed to pick up his next load in Florida, and so looked to see if there was something he could haul from Minnesota to Florida, so he'd get paid. He found a warehouse store in Florida who wanted a load of Christmas trees. So the trucker filled his "reefer" (refrigerated) trailer with Christmas trees, he had to purchase himself, and drove to Florida. When he got there the store didn't want his trees, too close to Christmas day perhaps and they didn't think they could sell them. So the trucker drove to the edge of the parking lot, opened the back of his truck, and started pulling trees out the back. As he did snow tumbled out into the hot Florida sunshine. Intrigued by the piles of melting snow and fresh Christmas trees, drivers pulled into the lot to she what was happening. The trucker sold his entire load of trees in one day. The trees were wrapped with twine and as he pull each one out he cut the twine and shake the tree to spread its branches. A sleepy rat dropped out of one tree, hit the pavement, looked around confused for a moment, then took off running. The trucker laughed, "That rat thought it found the best place to sleep through the winter in a bundled up tree, but woke months early in Florida. That must have been one confused rat."
Loved this episode, as it revealed not only animal's distributions, but their strange and intriguing methods... like being pooped out into a random pool or body of water... carp and killifish. ;-)
4:22 Something must have slipped through the cracks here: 600 million years ago in the late precambrian is far to early for marsupials to feasably have existed, as land animals didn't exist until hundreds of millions of years later.
This just remind me of the Ted-ed about eels, when Michael Aranda mentioned geographic forces, well my mind went to the oceanic migration of eels from Bermuda to fresh water rivers in Europe because of reproductive reasons. ^_^
All these comments about Precambian, I was thinking isn't Madagascar a Dreamworks franchise, meaning it couldn't be a Pixar short because they're owned by Disney
Speaking of species , it’s one of my many goals as a marine biologist to discover several new species of weird and interesting creatures in the deep parts of the ocean!
It looks like the supercontinent idea was right, just the wrong supercontinent in the wrong era: www.livescience.com/64897-why-marsupials-in-australia.html
Wait a Minute, what am I missing? The Precambrian war 500 million years ago, but mammals developed around the jurassic and fully fledged after the dinosaur extinction. There are about 400+ million years inbetween. How does that add up, or did I miss something in the part about the marsupials?
In New England we have at least two fresh water fish that are common; Sunfish and Yellow Perch. This area was covered by ice within the last 100,000 years and it seems impossible that a place like Cape Cod that was made by glaciers could have acquired these fish by flooding in such a short time. I believe that people brought these fish to ponds because they are easy to catch and good to eat.
Africa apparently was part of Gondwana too, by the looks of that map, so now I'm just curious as to why all the marsupials that ended up there apparently died. Also, carps might spread by crap? Huh. I wonder if some time in the future there'll be fish with big, juicy eggs that tempt birds to eat them so they can get to new bodies of water. Fruit-fishies sound pretty wild.
Many other examples exist. Stick insect eggs also are proven to be able to travel through bird droppings to remote Pacific Islands. Iguanas to a few are remote Pacific Islands like Fiji may have come through rafting from South America. Large tortoises are buoyant and may have ended up in small islands through sea currents.
Pretty sure that the Virginia oppossum came north *after* the Central American land bridge formed. North America was never part of Gondwanaland, and marsupials originated in South America.
Correction that the marsupials were not around in the precambrian, 600 Mya, and so you were probably thinking of the when gondwanna became it's own thing again after pangea broke up, during the mezosoic.
Funny synchronicity.. I was just watching a video about the Asian giant hornet living in the US, and I commented about how I saw one in Beverly,Massachusetts last year.. and I literally thought those exact words lol..
Its fascinating that in June 2020 in the middle of an apocalypse someome is studying the possible migration of carps by the digestive sistem of mallard ducks
You guys probably should have specified the marsupials made the move during the Jurassic. You make it sound like they existed during the Precambrian even though mammals hadn't even evolved at the time.
People got to Ireland initially.....by walking. Briton and Ireland are a part of the continent of EurAsia where the lowlands have been washed away by relatively shallow seas since the ebb of the last ice age. A island is not always a island.
Now I generally love what you guys do. But what in the heck is with the Range Splitting section? We've only had mammals around for 200 million years and marsupials for just over 65 million years. There is no way that they could have evolved 600 million years ago.
