Science is a mechanistic system of inquiry. It can potentially explain everything about the material universe, but I believe the material universe is only a part rather than the whole
It can, as long as the fundamental premise holds true - that no one is messing with the rules - that the rules are constant and unchanging. If Evolution is indeed done by design- where some external force ( and it could be space aliens , and not God for all I know..) interferes with the genetic code, Science will never figure it out unless they actually catch the designer in the act, and even then it will only show that only the occurrence under observation happened that way. Both random undesigned AND designed mutations could be happening through out history. Simple Darwinian Adaptations being in the former category, and the development of individual species by the latter. Or its all design. Or none of it is and it works through something we don't understand. Science is really a very limited tool. Also, I am pretty sure the Duck Billed Platypus is the work of some genetic engineers in 2614 who got drunk one night and figured it would be hilarious to create that animal and send it back though time to mess with us.
"Dude I am so wasted!"
"Me too. And I am bored. What should we do?"
"I know, lets mess with that new time machine in the physics lab!"
"Okay, sounds fun, but how?"
"How about we bio-engineer a unicorn as send it back to England in the Middle ages?"
"Nah, lets do a Dragon in China!"
"Yeah, they will mess those Cavemen Darwinists up!"
"Oh, man if you want to do that , we should do it right. Create a really messed up Animal. Like a Mammal with a duck bill and webbed feet! "
"Oh, man , thats great. lets have it lay eggs, and instead of teats, it will just secrete milk from its skin.. "
"Hey, lets make it poisonous too. like a Snake!"
"How are we going to get fangs into a duck bill? "
"Oh right. How about we put spurs on its legs!"
"Yeah! that will work. Hey lets make it like a fish too- give it sensitivity to electro-magnetic fields."
"Oh man, I can't wait till those pre-humans find this thing! Okay, it all plugged into the genetic manipulator. Hand me another Beer will ya?"
"uh oh. "
"what?"
"The computer says that the right ovary is going to be a dud. "
"Don't worry about it man, its just a joke. The thing obviously isn't going to survive in the wild for very long.. give it here.. and lets get over to the Physics lab before someone else beats us to it.."
"Oh wait.. I think I saw Jerry was working on something that hopped with a pouch just this afternoon!"
And that, is exactly how the Duck Bill Platypus came to be. Just proof that not all all designs are well done.. And that is not faith, its fact. What other possible conclusion could it be? And if you disagree you are a poopy head.