Evidence of Evolution
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21-05-2017, 05:01 PM
RE: Evidence of Evolution
All the marsupials live in the same geographical area on the planet.
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21-05-2017, 05:19 PM
RE: Evidence of Evolution
(21-05-2017 05:01 PM)Born Again Pagan Wrote:  All the marsupials live in the same geographical area on the planet.

Quote:Most people think of Australia when they think of marsupials, because the most well known of the marsupials—koalas and kangaroos—live there. But opossum species, which are also marsupials, live in North, Central, and South America.

http://animals.sandiegozoo.org/animals/marsupial
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21-05-2017, 05:38 PM
RE: Evidence of Evolution
(21-05-2017 05:01 PM)Born Again Pagan Wrote:  All the marsupials live in the same geographical area on the planet.

Most* marsupials live in the same geographic area. They are mostly in Australia and South America but you do get at least one extant group in North America (possums).


More general reply:
The evidence for evolution is robust and diverse within and outside the human species. Your pharyngeal nerve (and likewise the pharyngeal nerve of other tetrapods) is a good example of how structures are modified via evolution. Evolution tends to modify what is already there instead of constantly evolving de novo structures. So nerves like the pharyngeal nerve get extended and modified instead of rescultped. Which is why it still runs all the way down a giraffe's neck and then back up to the voice-box instead of directly from the brain to voice-box (does the same in you).

Outside of human-specific anatomy, you've also the homologous structures between different groups of organisms. Such as your limbs and the homologous bones. But also the similarity of eyes between the vertebrates and the dissimilarity they share with the eyes of other groups, like the molluscs. Because those two groups evolved eyes independently of one another via convergent evolution.

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21-05-2017, 09:08 PM
RE: Evidence of Evolution
(21-05-2017 05:09 AM)Gawdzilla Wrote:  Whale flipper, human hand, chimp hand, same structure. Common ancestor.

In fact, every mammal has the same skeleton - just in different relative proportions.
(There are minor exceptions; e.g. cats have more bones in their spines than humans do.)

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22-05-2017, 04:54 AM
RE: Evidence of Evolution
Inability to consistently produce viable offspring between members of the same genus. Example:

Antheraea polyphemus
Antheraea oculea

Subsequent matings between populations of these two Saturniid silk moths produce sterile offspring in two to four generations.
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22-05-2017, 05:04 AM
RE: Evidence of Evolution
(21-05-2017 09:08 PM)Chas Wrote:  In fact, every mammal has the same skeleton - just in different relative proportions.
(There are minor exceptions; e.g. cats have more bones in their spines than humans do.)

Cats do not have spines.
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22-05-2017, 05:08 AM
RE: Evidence of Evolution
(22-05-2017 05:04 AM)unfogged Wrote:  
(21-05-2017 09:08 PM)Chas Wrote:  In fact, every mammal has the same skeleton - just in different relative proportions.
(There are minor exceptions; e.g. cats have more bones in their spines than humans do.)

Cats do not have spines.
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22-05-2017, 05:10 AM
RE: Evidence of Evolution
(21-05-2017 09:08 PM)Chas Wrote:  
(21-05-2017 05:09 AM)Gawdzilla Wrote:  Whale flipper, human hand, chimp hand, same structure. Common ancestor.

In fact, every mammal has the same skeleton - just in different relative proportions.
(There are minor exceptions; e.g. cats have more bones in their spines than humans do.)
And importantly, the whales that have vestigial hind leg bones not connected to any other part of the skeleton. They used to have hind limbs, but the energy budget for them gets smaller and smaller...
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22-05-2017, 06:11 AM
RE: Evidence of Evolution
I find evolution especially interesting because it helps me make sense of a lot of things, especially behaviour.

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22-05-2017, 06:38 AM
RE: Evidence of Evolution
Borrowed from Skeptics Guide to the Universe:

[quote author=PANTS! link=topic=48687.msg9498863#msg9498863 date=1495399049]
https://www.vox.com/2016/9/8/12852924/ev...ga-harvard

Basically they took strains of e coli, put them on two ends of a huge sheet of agar, and painted bands of antibacterials at regular intervals. Then they left it for 6 days, and watched it grow. It's fascinating to watch the different sub-types break through one band and fill up the next layer only to be (momentarily) stymied by the next.

https://www.youtube.com/watch?v=plVk4NVIUh8
[/quote]
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