If science does need to defend it's use and claim of a same nature in the past then get to it.
How would I know? Not sure it matters. I suspect that some planets and or heavenly objects may have been in different positions. That could at least sometimes affect gravity on earth as the moon affects it now. But who really knows?
No one insisted gravity was somehow smaller or greater.
Not the laws of the universe, the forces and laws of the fishbowl! As far as interpreting evidences on earth as if they had to come about by present nature, well how else could they possibly see things when that is all they look for?!
I doubt that.
Or different!?
The trick is not just to use your beliefs to explain all things, but to admit you don't know. The fossil record is almost useless in determining the variety of life that lived at any given time.
Why legs? How about the eyes of a dragon fly? How about the size of birds that used to be able to fly? How about the size in general of dinos and some other things that require extraordinary explanations and convoluted assumptions to make them fit the present nature world? How about the sudden burst of different kinds of life in the Cambrian? How about moving huge ancient stones and pics in the ground that seem to have been drawn for folks in the air? What exactly is it you claim any dino leg tells you?? You might as well read tea leaves.
Name an example. Show how the leg bone shows exactly how fat the leg was? You do realize many many species of fossilized remains have precious little to work with? You thought they were all complete skeletons?
So can legos...so??
From your link
"d) Why the abundant fossil footprint are proportionately comparable
(They'd have sunk up to the armpits were they standing on dry land)"
--The depth to which an animal sinks is a product of the shear imposed on the substrate, not simply total mass. This depends on the stress on each foot, as well as duty factors and substrate conditions. In short, there is no reason to think that a large dinosaur would sink appreciably deep on dry land. Elephants, for example, do not leave footprints much deeper than those of humans."
The depth to which anything sank depended on the ground that existed that they stood on. If consistency/constitution/density etc of ground and rock were different, then we could not measure how deep some weight sinks today in a particular soil we think the prints were laid down in. The point of the article was that the guy claimed that decades ago they used to claim a lot of dinos spent most of their time in water. Now they changed their tune and have more elaborate same past nature explanations! As usual, they get busted and conflate issues better!
Yeah, and make those giant freakazoid birds did something like that. Or maybe life was just easier for them in that former different nature.
How many of those have to stay in the air all day and feed from the air while gliding?
They look at what their belief system NEEDS to have as truth.
""There is no way that pterosaurs could have managed sustained flapping flight unless they had an elevated metabolic rate, unless they could get oxygen into their cells and carbon dioxide out rapidly," he said. "They couldn't have flapped for more than a few minutes if they had been cold-blooded. They would have crashed to the ground."
Pterosaurs Article, Pterosaurs Information, Facts -- National Geographic
This could be correct. However, maybe nature was different, so we don't need the extraordinary explanation!? Ha.
From the same link, we see a creature with a crest. They have no modern use for this, so they invent same nature past reasons it had to exist!
"
Pteranodon and its crest have perplexed researchers since the 1870s, when its bones turned up in the chalk layers of western Kansas.
Some viewed the crest as a forward rudder, enabling the almost tailless pterosaur to steer while flying.
Other scientists proposed that
Pteranodon's crest served as an air brake: To slow down for landing, the animal would simply turn its head broadside to the wind."
Then we see this
"Although the mating rituals of
Pteranodon remain speculative, one aspect of its behavior is clear from the fossil record. The remains of
Pteranodon are found in rocks that lay more than a hundred miles (160 kilometers) out to sea in the Cretaceous period. This fish catcher, which had a wingspan of up to 24 feet (7.3 meters), must have regularly soared vast distances over the waves, its wings outspread to catch the steady ocean winds."
Well, how about let's look at the basis for claiming that the area was out to sea when the creature lived?? Can you give us that?
we continue in same link
"
The triumphant reign of pterosaurs ended with this giant flier. At the end of the Cretaceous period 65 million years ago, a meteorite or comet slammed into Earth. That calamity—and other events—wiped out roughly three-quarters of all animal species, including all remaining pterosaurs and dinosaurs. But the number of pterosaur species appears to have dwindled for millions of years before the cataclysm, suggesting that something else contributed to their fate.
It could be that the evolutionary achievements of pterosaurs ultimately led to their downfall."
Since I place the timing of the flood at that time, what I read here is that the few remaining big fliers didn't make it through the flood event. When I see that they declined before the flood, that tells me that probably the world was changing and maybe many started adapting rapidly another way..or that other creatures maybe started to like their bacon...etc etc. The only song and dance we hear from origin fable science is how evolution dunit.
"
Whatever the cause of their demise, pterosaurs enjoyed unparalleled success. They trailblazed a path into sun-drenched skies before any other vertebrate. For 150 million years they sailed the winds on the strength of a fragile finger. What a glorious ride they had."
This even reads like a fable!! Evo brain freeze dreaming!

But they did not live before other creatures! They simply fossilized while others did not!