Wiki Wormhole: Double your pleasure with Wikipedia’s look at twins

With more than 4.9 million articles, Wikipedia is an invaluable resource, whether you’re throwing a term paper together at the last minute, or looking for evidence that your twin sister is the evil one. We explore some of Wikipedia’s oddities in our 4,904,354-week series, Wiki Wormhole.

This week’s entry: Twins

What it’s about: This week’s topic was suggested by The A.V. Club‘s resident twin, Caitlin PenzeyMoog, who insists she’s the good twin. Twins are, of course, humans who shared a womb with a sibling before being born. As this only happens once in every 90 or so births, twins have been a subject of fascination around the world. There are two types of twins—identical, in which a fertilized egg splits into two genetically identical embryos, and fraternal (sometimes called sororal when both are girls), in which two separate …

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