

#326251
Posted 11 February 2025 - 15:35
#326252
Posted 11 February 2025 - 16:09
Quote
When a notochord (a stiff rod of compression-resistant cells running along the bodies of all chordates at some point in their lives—including vertebrates, where in humans it becomes part of the spinal disks) was found in the tail of one vetulicolian, Nesonektris (seen at 1:01 in the video), it became clearer that they were true chordates, possibly related to tunicates or sea squirts (whose tadpole-like larvae likewise have notochords in their tails).
However, a newer study of another prehistoric chordate animal, Pikaia , instead considers them all as a sort of "missing link" between non-chordate ancestors and true chordates instead of their own distinct group—though this study interestingly does not reference the findings of the one where Nesonektris was discovered.

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#326254
Posted 11 February 2025 - 17:12

#326256
Posted 11 February 2025 - 17:27
#326257
Posted 11 February 2025 - 17:43
The brave hide behind technology. The stupid hide from it. The clever have technology, and hide it.
—The Book of Cataclysm


#326258
Posted 11 February 2025 - 18:02

#326260
Posted 11 February 2025 - 19:11
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The brave hide behind technology. The stupid hide from it. The clever have technology, and hide it.
—The Book of Cataclysm


#326262
#326263
Posted 12 February 2025 - 01:04

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#326264
Posted 12 February 2025 - 04:46

#326266
Posted 12 February 2025 - 08:23
#326267
Posted 12 February 2025 - 08:45
TheDR, on 12 February 2025 - 01:04, said:
The brave hide behind technology. The stupid hide from it. The clever have technology, and hide it.
—The Book of Cataclysm


#326268
Posted 12 February 2025 - 09:07
#326270
Posted 12 February 2025 - 10:21
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The brave hide behind technology. The stupid hide from it. The clever have technology, and hide it.
—The Book of Cataclysm


#326272
Posted 12 February 2025 - 11:09


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