U.S. CitiesCity-Data Forum Index
Covid-19 Information Page
Go Back   City-Data Forum > General Forums > Nature
 [Register]
Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
View detailed profile (Advanced) or search
site with Google Custom Search

Search Forums  (Advanced)
 
Old 04-17-2014, 10:18 AM
 
Location: Chapel Hill, N.C.
36,500 posts, read 45,549,997 times
Reputation: 47508

Advertisements

Interesting.

New Fossil Takes A Bite Out Of Theory That Sharks Barely Evolved : The Two-Way : NPR
Reply With Quote Quick reply to this message

 
Old 04-17-2014, 11:46 PM
bjh
Status: "Keep calm and carry on." (set 3 days ago)
 
Location: Memphis - home of the king
35,931 posts, read 24,708,375 times
Reputation: 124859
They may not have changed as much as some animals, for example whales. That's because they are so effective at their job: eating other fish.

But given enough time, there's always room for improvement.
Reply With Quote Quick reply to this message
 
Old 04-18-2014, 10:34 AM
 
Location: Type 0.7 Kardashev
10,576 posts, read 7,636,943 times
Reputation: 37555
The whole idea that a given species 'evolves less' than any other species represents a misunderstanding of evolution.

If a particular species remains well-suited to its environment and does not exhibit as much change over a period of time as another species, that is because selective evolutionary pressures are actively working to keep the gene pool of that species well-suited to its environment.
Reply With Quote Quick reply to this message
 
Old 04-18-2014, 10:44 AM
 
947 posts, read 1,226,640 times
Reputation: 779
This is also based on a misunderstanding of what a living fossil is. A living fossil just means it's part of the same family or genus of a species in the fossil record. Not that it is the same species or hasn't undergone any evolutionary changes.

Take the coelcanths. The ones in the fossil record lived in fresh water and laid eggs. The two species that have been discovered in the 20th century live in salt water ocean and give live birth. Along several other differences in their bodies.
Reply With Quote Quick reply to this message
Please register to post and access all features of our very popular forum. It is free and quick. Over $68,000 in prizes has already been given out to active posters on our forum. Additional giveaways are planned.

Detailed information about all U.S. cities, counties, and zip codes on our site: City-data.com.


Reply
Please update this thread with any new information or opinions. This open thread is still read by thousands of people, so we encourage all additional points of view.

Quick Reply
Message:

Over $104,000 in prizes was already given out to active posters on our forum and additional giveaways are planned!

Go Back   City-Data Forum > General Forums > Nature
Follow City-Data.com founder on our Forum or

All times are GMT -6. The time now is 04:45 PM.

© 2005-2020, Advameg, Inc. · Please obey Forum Rules · Terms of Use and Privacy Policy · Bug Bounty

City-Data.com - Archive 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35 - Top