Recently the topic of transitional forms ("missing links") came up, so I thought I'd post a separate thread on it since it's a common question that arises. I will cut to the chase.
1. It is false to state that there are no transitional forms. That is simply not true.
2. However, it is also true that gradualism is a failed prediction of Darwinism. Darwin's predicted we'd find the missing links, and we have found a number of them and continue to find more, but most are still missing.
3. However, more and more the 'saltationists' that Darwin rejected "natura non facit saltum!" ("Nature does nothing in jumps!")---are increasingly being vindicated. More and more evidence continues to mount that small genetic changes and tweaks in development pathways can result in large evolutionionary "leaps/jumps." Instead of gradualism, it does seem much evolution happens in jumps. A single mutation can change the location of body appendages or cause leg bones with musculature to develop in fish fins.
More to the point. The fossil record really only affords two options:
(1) Evolution (by nature and/or intelligent design); or
(2) "Progressive Creation"
If evolution is rejected, then that leaves God created a group of organisms most of which go extinct, and then God creates another group of organisms most of which go extinct, and then God creates another group of organisms most of which go extinct, and so on.
That's the basic pattern we see in the fossil record: succession of different paleocommunities of organisms. Like the Gabionta biota that appears then goes extinct. Then the Ediacaran biota that appears, persists for awhile, then goes extinct, then the Cambrian, then the Ordovician and so on. Paleocommunities appear, persist for awhile, then go extinct, only to be replaced by a new paleocommunity of organisms.
But back to the topic, yes, there are transitional forms, even though this is still denied by YECs, but after awhile the denial just becomes knee jerk and willful. Let me give an example:
The endlessly repeated "there are no transitional forms" mantra of YECs is an interesting study. First, the term "transitional form" is a slippery YEC term that YECs define in such a way as to make it impossible to ever demonstrate (even if we were just talking about human history and your own family tree!). But that aside, what I find interesting is how this YEC mantra persists regardless of how many "transitional" forms are found; which begs the question of how many "transitional" forms will it take to make a YEC happy before they're willing to acknowledge, "Okay, maybe, just maybe, those things might be related to each other"? And the answer, of course, is that no amount of "transitional" forms will ever be enough, because they've already pre-decided (before any evidence) that they are not related, no-way, no-how, no matter what.
The example that comes to mind is the origin of tetrapods (incorrectly called the "fish-to-amphibian" transition by YECs). And specifically I recall a picture in YEC Duane Gish's 1970s/1980s book "Evolution: the Fossils Say No!" that criticized the "lack of transitional/intermediate forms" between fish and tetrapods:
"THERE ARE NO TRANSITIONAL FORMS!"
The Gish picture (figure 1) is still used by YECs today (figure 1 caption) to say "look, fully formed fins & feet with no intermediate transitional forms in between!"
Of course, Ichthyostega (discovered in 1932) was already old news, and before the days of the Internet information was harder to find, so perhaps Gish didn't know about Acanthostega (discovered 1952) which had characters intermediate between fish and Ichthyostega. Of course, once that discovery became more well known that still wasn't a good enough transitional form, so the YECs could still shout:
'THERE ARE NO TRANSITIONAL FORMS!"
And then, of course, more discoveries were made, but for whatever reason these weren't good enough, or didn't count, or still left large "gaps," so YECs felt they could still confidently shout:
"THERE ARE NO TRANSITIONAL FORMS!"
And then more discoveries were made...
"THERE ARE NO TRANSITIONAL FORMS!"
And still more discoveries were made (like the discovery of Tiktaalik in 2006)....
"THERE ARE NO TRANSITIONAL FORMS!"
*So evolution keeps changing, while young earth creationism stays the same ("THERE ARE NO TRANSITIONAL FORMS!"), and apparently no amount of "transitional forms" will ever be enough to get YECs to acknowledge, "Hey, you know, maybe, just maybe, those things might be related." OR EVEN JUST, "I still disagree, but I can see why everyone else concludes that they're related."
1. It is false to state that there are no transitional forms. That is simply not true.
2. However, it is also true that gradualism is a failed prediction of Darwinism. Darwin's predicted we'd find the missing links, and we have found a number of them and continue to find more, but most are still missing.
3. However, more and more the 'saltationists' that Darwin rejected "natura non facit saltum!" ("Nature does nothing in jumps!")---are increasingly being vindicated. More and more evidence continues to mount that small genetic changes and tweaks in development pathways can result in large evolutionionary "leaps/jumps." Instead of gradualism, it does seem much evolution happens in jumps. A single mutation can change the location of body appendages or cause leg bones with musculature to develop in fish fins.
More to the point. The fossil record really only affords two options:
(1) Evolution (by nature and/or intelligent design); or
(2) "Progressive Creation"
If evolution is rejected, then that leaves God created a group of organisms most of which go extinct, and then God creates another group of organisms most of which go extinct, and then God creates another group of organisms most of which go extinct, and so on.
That's the basic pattern we see in the fossil record: succession of different paleocommunities of organisms. Like the Gabionta biota that appears then goes extinct. Then the Ediacaran biota that appears, persists for awhile, then goes extinct, then the Cambrian, then the Ordovician and so on. Paleocommunities appear, persist for awhile, then go extinct, only to be replaced by a new paleocommunity of organisms.
But back to the topic, yes, there are transitional forms, even though this is still denied by YECs, but after awhile the denial just becomes knee jerk and willful. Let me give an example:
The endlessly repeated "there are no transitional forms" mantra of YECs is an interesting study. First, the term "transitional form" is a slippery YEC term that YECs define in such a way as to make it impossible to ever demonstrate (even if we were just talking about human history and your own family tree!). But that aside, what I find interesting is how this YEC mantra persists regardless of how many "transitional" forms are found; which begs the question of how many "transitional" forms will it take to make a YEC happy before they're willing to acknowledge, "Okay, maybe, just maybe, those things might be related to each other"? And the answer, of course, is that no amount of "transitional" forms will ever be enough, because they've already pre-decided (before any evidence) that they are not related, no-way, no-how, no matter what.
The example that comes to mind is the origin of tetrapods (incorrectly called the "fish-to-amphibian" transition by YECs). And specifically I recall a picture in YEC Duane Gish's 1970s/1980s book "Evolution: the Fossils Say No!" that criticized the "lack of transitional/intermediate forms" between fish and tetrapods:
"THERE ARE NO TRANSITIONAL FORMS!"
The Gish picture (figure 1) is still used by YECs today (figure 1 caption) to say "look, fully formed fins & feet with no intermediate transitional forms in between!"
Of course, Ichthyostega (discovered in 1932) was already old news, and before the days of the Internet information was harder to find, so perhaps Gish didn't know about Acanthostega (discovered 1952) which had characters intermediate between fish and Ichthyostega. Of course, once that discovery became more well known that still wasn't a good enough transitional form, so the YECs could still shout:
'THERE ARE NO TRANSITIONAL FORMS!"
And then, of course, more discoveries were made, but for whatever reason these weren't good enough, or didn't count, or still left large "gaps," so YECs felt they could still confidently shout:
"THERE ARE NO TRANSITIONAL FORMS!"
And then more discoveries were made...
"THERE ARE NO TRANSITIONAL FORMS!"
And still more discoveries were made (like the discovery of Tiktaalik in 2006)....
"THERE ARE NO TRANSITIONAL FORMS!"
*So evolution keeps changing, while young earth creationism stays the same ("THERE ARE NO TRANSITIONAL FORMS!"), and apparently no amount of "transitional forms" will ever be enough to get YECs to acknowledge, "Hey, you know, maybe, just maybe, those things might be related." OR EVEN JUST, "I still disagree, but I can see why everyone else concludes that they're related."