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I bet you didnt know that
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Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 90,714 Mod ✭✭✭✭
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You want good vision the Mantis Shrimp as way more than 4 colour receptors.
https://theoatmeal.com/comics/mantis_shrimp
They can also see ultraviolet and infrared and well as linear and circular polarised light. And each of it's eyes can estimated distance far more accurately than we can.0 -
Moderators, Arts Moderators, Recreation & Hobbies Moderators, Social & Fun Moderators Posts: 76,358 Mod ✭✭✭✭
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Capt'n Midnight wrote: »You want good vision the Mantis Shrimp as way more than 4 colour receptors.
https://theoatmeal.com/comics/mantis_shrimp
They can also see ultraviolet and infrared and well as linear and circular polarised light. And each of it's eyes can estimated distance far more accurately than we can.
Ah, but we knew that already!
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Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 90,714 Mod ✭✭✭✭ Join Date:Posts: 88954
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Moderators, Science, Health & Environment Moderators, Society & Culture Moderators Posts: 60,075 Mod ✭✭✭✭
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Neandertal women yes, but that's much less the case with Modern Humans P, which those folks were. Their skeletons look the same as current Aboriginal people. They would have been stronger yeah, because of their workload, but not that much stronger. Though I do recall reading that studies of the legs and pelvis of an even earlier ancestor Homo Erectus strongly indicated they were built for speed and could have been faster than modern human olympic runners. One hypothesis goes that part of their food gathering strategy was to get to animal kills more quickly than other scavengers and fast ground speed was their adaptation, or it was a straightforward hunting adaptation. Much like the San Bushmen even today can chase and run down antelopes by wearing them down. Native Americans would run down horses in a similar way.Professor Moriarty wrote: »Prehistoric women typically had stronger arms than modern elite rowers and some of them had stronger legs than modern ultramarathon runners.
There are two things about humans that we kinda forget. As far as eye level goes we're one of the tallest animals on the planet and about the tallest predator, and there are very few animals modern humans can't run down over distance. Wild canids like wolves about the only ones we couldn't as they have a similar hunting strategy when it comes to game bigger than themselves. And that's another difference with us, we're one of the very few predators that routinely hunted and took down prey bigger than ourselves. You see that with our pets. Cats are superbly built predators, but they're generally not so daft to go after bigger prey than themselves. On the other hand your average terrier if it sees a deer or cow will figure "fcuk it, let's have a go!" and we're the same. Daft essentially. Though occasionally it didn't go so well...
Rejoice in the awareness of feeling stupid, for that’s how you end up learning new things. If you’re not aware you’re stupid, you probably are.
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Neandertal women yes, but that's much less the case with Modern Humans P, which those folks were. Their skeletons look the same as current Aboriginal people. They would have been stronger yeah, because of their workload, but not that much stronger. Though I do recall reading that studies of the legs and pelvis of an even earlier ancestor Homo Erectus strongly indicated they were built for speed and could have been faster than modern human olympic runners. One hypothesis goes that part of their food gathering strategy was to get to animal kills more quickly than other scavengers and fast ground speed was their adaptation, or it was a straightforward hunting adaptation. Much like the San Bushmen even today can chase and run down antelopes by wearing them down. Native Americans would run down horses in a similar way.
There are two things about humans that we kinda forget. As far as eye level goes we're one of the tallest animals on the planet and about the tallest predator, and there are very few animals modern humans can't run down over distance. Wild canids like wolves about the only ones we couldn't as they have a similar hunting strategy when it comes to game bigger than themselves. And that's another difference with us, we're one of the very few predators that routinely hunted and took down prey bigger than ourselves. You see that with our pets. Cats are superbly built predators, but they're generally not so daft to go after bigger prey than themselves. On the other hand your average terrier if it sees a deer or cow will figure "fcuk it, let's have a go!" and we're the same. Daft essentially. Though occasionally it didn't go so well...
Actually, it wasn't just Neanderthal women, it was women right up to and including the Iron Age. Basically, they did most of the farming and household chores.There's a good article on it here. It wouldn't be PC for me to mention that modern women might think of doing more housework to tone up. So I won't say it.0 -
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Early man (or cave lady) owed a lot to throwing 'technology'
- rather than sheer strength, speed or agility when hunting.
This type of 'throwing stick' can be seen in pet shop for doggy 'throw the ball' aids.
This 'atlatl' is a basic tool that uses leverage to achieve greater velocity,
thereby piercing larger animals better, and at greater distances.0 -
Moderators, Science, Health & Environment Moderators, Society & Culture Moderators Posts: 60,075 Mod ✭✭✭✭ Join Date:Posts: 59004
They went nuts decorating them too. Vanishingly few from the Palaeolithic are plain.
Pretty much all their portable wooden and bone stuff was decorated. Carving bone or ivory with flint tools was not easy to do and is hard going and longwinded. They loved the oul art and interestingly in that early period of wonder human habitation in Europe the art is the same style from the Mediterranean to the other side of the alps. It's also more complex than the later stuff generally is. That seems counterintuitive as we tend to move towards more skill, more complexity. Before accurate dating came along it was usually the most complex stuff was attributed to later periods and when decent dates came along it came as a shock as the fanciest stuff tended to be the earliest. Another interesting thing is the earliest cave art tended to portray few of the animals they actually hunted and ate, so you get lions and rhino and the like, whereas later stuff has more prey animals and more human figures creep in.
The use of bone as a material was really jumped upon by modern humans. It seems an obvious material, but previous folks like Neandertals for example didn't seem to use it much, or we haven't found much evidence they did(they did work wood quite a bit, preservation is the issue there).Rejoice in the awareness of feeling stupid, for that’s how you end up learning new things. If you’re not aware you’re stupid, you probably are.
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Fair play to whoever made this because they avoided a really common mistake on the last one.
I worked it out myself and the value is 64.7 trillion kilometers, which is 6.84 light years.
The distance between Earth and Bernard's star (4th closest star) is 5.96 light years for comparison. So the universe gained enough extra space to fit a sphere holding our Solar system and the triple star Alpha Centauri system.
The Alpha Centauri system has one confirmed planet orbiting the smallest of the three suns, Proxima Centauri, and is within Proxima's habitable zone. There is also most likely a molten rock world orbiting the middle sized sun Beta Centauri, but the data isn't strong enough to confirm it yet.
It's possible that all three stars have planets and there might be planets orbiting all three at once, but we haven't seen any yet.0 -
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