Do they not teach evolution in schools anymore?
Organisms with better memory had a better chance at survival and procreation. That's all there is, no creation involved. Maybe if our memory was created, witness statements wouldn't be so terribly unreliable. As with most stuff evolved by natural selection, it's just good enough to do the job until the offspring is thriving without further parental need.

it's magic


I see sarcasm here spurg

DNA didn't know giraffes needed longer necks. Short neck giraffes were just more likely to starve in the region they lived in or become weak because they couldn't reach high enough to eat from trees. Where there is enough to eat like a jungle, giraffes would be smaller and lose their neck and long legs resembling a horse. Deeper in a jungle they would develop arms instead of legs because it gets hard to move in a jungle with uneven ground mud and plants everywhere thus you would die without properly adjusted limbs. A polar bear dies if you put him in a desert but the right mutations may occour if it takes a long time. Just the human can survive everywhere its more efficent and faster to change the environment instead of waiting for millions of years that random mutations get the work done eventually.