0_Apprentice
My cousin just gave birth to twin boys
1_Wizard
Wow, having two kids in the same pregnancy must have been an experience.
0_Apprentice
Well she had a daughter first but still it was a unexpected surprise.
1_Wizard
In fraternal twins, each twin is fertilized by its own sperm cell
0_Apprentice
They and identical twins the look like you copy and pasted a baby
1_Wizard
The birthrate of twins in the US rose 76% from 1980 to 2009
0_Apprentice
That is kinda crazy! But I dont think I have seen a pair in many years
1_Wizard
I have seen quite a few. Non related look alikes that aren't twins are called doppelgangers. I have a few of them,
0_Apprentice
I wonder if they share personailty traits or just looks
1_Wizard
I bet that has been studied. North America and Europe have rates of 9 to 16 twin births per 1,000 births.