In the United States, it is estimated that for every 1,000 children born, 33.3 of them will be twins; 22.8 of which will be fraternal and 4 of which will be identical. Throughout history, it has been widely held that twins could only be born as either identical or fraternal; however, this notion changed in 2007 when the birth of two semi-identical twins were discovered in the U.S.

Related article: Conjoined Triplets (Is It Even Possible?)

Identical vs. Fraternal Twins

The way in which twins become identical or fraternal depends entirely upon what happens during fertilization of the mother’s egg. Identical, or monozygotic twins, arise from a single fertilized egg that has been split into two. Identical twins will therefore have identical genetic material, which accounts for why these twins are often indistinguishable from each other. read more

This is a collection of links to gross videos. The footage contains some of the most disgusting people on the Web. From stomach-churning pimple popping videos, to long and nasty farts, this post has it all. Although the following scenes are extremely repulsive, some are quite hilarious.

Warning: Graphic content ahead. It may make you puke.

Nauseating Scenes From Around The Web

#1 Security Guard Documents Farts At Work For 6 Months

For six months, a security guard at a Florida hospital filmed himself farting at work. Although his name is Doug, the Internet knows him as Paul Flart (which is his Instagram handle). His 6-month fart compilation all started when he liked the sound of what he calls a really “nice” one. In an interview with Vice, he said: “One day I ripped a rather nice one and got really good sound from it, so the next time it happened I recorded it and sent it to my group chat.” His friends encouraged him to share his compilation on the Internet. read more

So you want to see some cool websites without having to spend a lot of time searching for them? Well, look no further. We found 15 of the coolest and most sophisticated sites online! With over 1 billion on the Internet, you are bound to find some that are not only extremely impressive, but also useful. According to Mashable.com, the very first domain was registered on March 15, 1985 (Symbolics.com). So, for about 30 years, people have been creating websites.

In our post called 15 Weird Websites, we found a list of sites that are not only strange, but also some that are useless. Today, we will share 15 that you will probably find fun, entertaining and useful. We divided our list of 15 into 3 separate sections so you can see a variety of what is on the World Wide Web. Let’s first start with a site that can create a doll or action figure of yourself. read more

Oliver was a young chimpanzee, likely kidnapped from the Congo at an early age, and sold to animal trainers in 1970. Frank and Janet Berger noticed as the chimp aged that he had very human-like traits, such as walking upright and having features that resembled an old man. Oliver was trained by the Bergers for 7 years, when another peculiar trait made itself known to the pair of trainers.

Oliver seemed to be attracted to Janet, much more so than any of the female apes which were also kept by the Bergers. To her displeasure, Oliver may have tried to mate with her. This was the end of the road for Oliver with the Bergers, and they sold him to a lawyer named Michael Miller. read more

With virtually unlimited places to find a date, you are guaranteed to find some that can help you find exactly what you’re looking for. These weird dating websites are so oddly specific, you won’t believe they exist. Interestingly, in 2015, the booming online dating industry was estimated to be worth $2.5 billion. It is expected to grow 5.1% per year to $3.2 billion by 2020. Online Dating Magazine estimates that there are 8,000 online dating services worldwide.

Note: In order to find the age requirement, information on registration, and to ensure the websites are safe to use, I signed up as a non-paying member. Despite an age requirement of 18 (for the majority of the following sites), depending on local laws, some states may require you to be 21. read more