Because of shitty fake, manipulative documentaries Discovery put out for shark week. They flat out said they were experimenting with story telling and how to draw in viewers. They also said this year they would be doing more 'facts' and actual research, but take that as you will.
The Discovery Channel took the reality TV show route a long time ago. They had a show about the 'amish mafia' for fucks sake. Just stop watching TV all together, OP. It's never going back to actual educating documentaries that serenade you with their monotone narrators.
I can honestly say I wish it was still around, but there has been zero hardcore findings that it does. I would think at this point we would have gotten at least a few things to point to it being there like, "Holy shit, this blue whale was bitten straight the fuck in half."
>>2033660 My coworker does too. When it first came out she was having a fit telling me they got actual for real evidence of merfolke, and I was like yea? And then I saw the show and I was like, they have for real evidence of shitty photoshop,
>>2033642 Their only predators for an adult great white are orcas. Killer whales are larger and ambush great whites in short bursts of top speed that are much faster them than them. Other than that, they don't have competition except for smaller great whites or juveniles.
In the Cenozoic era where megalodons lived, there was more competition between large marine predators. We had more carnivorous whales, like the Livyatan which also inhabited the oceans the same time as megalodon. It was similar to sperm whales, but had more functional jaws that would allow it to grab larger prey rather than just feeding on squid and is suspected that it also hunted other whales. You also had other large, megatooth sharks around. The decline of large marine reptiles also probably contributed in sharks and whales rising up but in the end, we lost many large marine animals. One of the factors is that they just didn't have enough prey to live on. Hell, look at the largest mammals in the ocean right now. The blue whale eats krill, fin whales(second largest after blue whales) eat krill, small fish, crabs, squid, etc, whale sharks eat krill, plankton, fish eggs, etc and sperm whales mainly eat squid, but also eat small fish and sometimes sharks. They are probably successful since those times and survived because they didn't have to rely on hunting large prey.
>>2033660 >>2033667 When that dragons documentary came out in 2004, I had the biggest fights with friends and my brother because they thought they were real. I never saw anything but clips from the mermaid documentary, but at least the dragons one tried to make them somewhat realistic(the wyvern dragon with the dinosaur was pretty cool). I like speculative science and 'what if' scenarios but I can't imagine what bs excuses they made up to make those spermaids things functional.
>>2033672 Also, apparently in the beginning humans were split into land dwellers and sea dwellers, who had to evolve to like in the ocean. They soon learned of the horrors of us land walkers trying to kill them or whatever so they stay away from us.
>>2033699 You know, if they would have presented it as,"Here is a theory on mermaids and how they would have come to be" it would be a lot better. Instead of passing it off as undeniable truth, more like, consider the following...
>>2033720 No? If you have an idea- lets say I have an idea the cheese graters were the start of all life in the world, that is a theory. I would then go about gathering research and proof to support my THEORY. Anything can be a theory. A smart one? No. But a theory none the less.
"A scientific theory is a well-substantiated explanation of some aspect of the natural world that is acquired through the scientific method and repeatedly tested and confirmed through observation and experimentation." - Wikipedia
What you're talking about is a hypothesis and the subsequent testing. What you /think/ is a theory is actually an idea.
>>2033759 I swear to you, senpai-anon, I'm not like those other fools. They are not real, they do not understand what they don't understand like me. Please senpai-anon, take me, take me and teach me your ways.
It probably originates from a megalodon tooth found by the HMS Challanger in 1872. For the longest time was thought to be only about 10,000 years old, and it was only re-examined and debunked about a decade ago, somewhat ironically by an investigation led by MonsterQuest.
The widespread belief predates those fake documentaries, though. The possibility of megalodon and carcharias being the same species was present in pop-culture as early as 1974, when Peter Benchley wrote about it in the original JAWS novel. Steve Alten's MEG became a huge best-seller too of course, riding the 90's Jurassic-mania while presenting the surviving deep-sea population theory in a way that sounded scientifically plausible and convincing to your average joe.
Hey guys, I have this question regarding evolution especially with the GW and Megalodon so I might as well ask it now.
At what point in evolution does an animal become a separate species? If GW is so related to Megalodon, what made them split? Does GW come from Megalodon? Or did they split from a common ancestor like us and chimps? Even then, when does a new species evolve from a common ancestor? It's not like pokemon; evolution is gradual.
>>2034002 >At what point in evolution does an animal become a separate species? when it stops breeding with other members of its species. >If GW is so related to Megalodon, what made them split? They aren't necessarily that closely related. The split presumably had to do with time and diet. Probably climate and sea level as well. >Does GW come from Megalodon? not really. >Or did they split from a common ancestor like us and chimps? Sort of, though that's not a great example since the common ancestor of humans and chimps is a chimp. We descended from chimps. Like we literally bred with genetically modern chimps during our early evolution.
Great whites and Megalodon probably aren't even that closely related. >Even then, when does a new species evolve from a common ancestor? the last time they mate with their previous species.
e.g., the human lineage became a distinct species from chimps approximately the same time our ancestors last mated with chimps.
>>2034135 >plants and animals constantly hybridize yes, you're very smart.
We're talking about the population as a whole though. Individuals may breed with members of their previous species, but when the population in general doesn't it has either become a new species or is well on its way.
>>2034140 >We're talking about the population as a whole though it happens to populations as a whole in plants, try Dactylorhiza for example, you're going to have a hard time finding plants that aren't hybrids.
it doesn't happen with members of the precious species, animals and plants fuck around with pretty much everything they can fertilize, and some even do it with what they can't fertilize.
>>2034165 the amount came from something less than 100 matings iirc, all of which were with females. It seems unlikely the entire population of Neanderthals was ever limited to less than 100 individuals, all female.
>>2034178 >you can't name any animals that commonly hybridize? not more than a fraction of the time. If that happened we'd synonymize them and they wouldn't be considered interspecific hybrids anymore.
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