![us iran flags](https://media.cnn.com/api/v1/images/stellar/prod/200110164533-us-iran-flags.jpg?q=x_0,y_114,h_1230,w_2187,c_crop/w_1280)
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How the US and Iran became enemies
Tensions between the US and Iran have been prevalent for decades, but where did it start? CNN takes a look.
03:39
- Source:
CNN
Stories worth watching
16 videos
![This bagel-looking bread is guang-bing, and it helped China win a war 500 years ago.](https://media.cnn.com/api/v1/images/stellar/prod/200819180502-02-gbs-chinese-bagel-restricted.jpg?q=x_0,y_122,h_1178,w_2094,c_crop/w_250)
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How a 500-year-old Chinese 'bagel' helped win a war
![For the Salam Stars, basketball is about more than just the score. The all-Muslim girls team are breaking stereotypes and crushing it on the court.](https://media.cnn.com/api/v1/images/stellar/prod/200818111302-02-gbs-girls-basketball-restricted.jpg?q=x_0,y_138,h_1178,w_2094,c_crop/w_250)
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How this all-Muslim girls basketball team is crushing it on the court
![Whether you get your kicks from PUMA or adidas, know that you're part of a legendary sibling rivalry, one dating all the way back to 1930s Germany.](https://media.cnn.com/api/v1/images/stellar/prod/200818094425-02-gbs-puma-vs-adidas-restricted.jpg?q=x_0,y_0,h_1080,w_1919,c_fill/w_250)
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The sibling rivalry behind Adidas versus Puma
![01_GBS oldest pub RESTRICTED](https://media.cnn.com/api/v1/images/stellar/prod/200807150039-01-gbs-oldest-pub-restricted.jpg?q=x_0,y_0,h_1080,w_1919,c_fill/w_250)
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Searching for the oldest pub in the world
![If you lose something in Tokyo, you might actually get it back. This is how one of the world's best Lost & Found systems works.](https://media.cnn.com/api/v1/images/stellar/prod/200818105416-01-gbs-lost-and-found-restricted.jpg?q=x_2,y_0,h_1078,w_1915,c_crop/w_250)
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How Tokyo's massive lost & found works
![Great Big Story breakfast around the world gbs_00094325.jpg](https://media.cnn.com/api/v1/images/stellar/prod/200807150213-great-big-story-breakfast-around-the-world-gbs-00094325.jpg?q=x_90,y_97,h_893,w_1588,c_crop/w_250)
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What breakfast is like around the world
![01_GBS elephant RESTRICTED](https://media.cnn.com/api/v1/images/stellar/prod/200807133001-01-gbs-elephant-restricted.jpg?q=x_2,y_0,h_1078,w_1915,c_crop/w_250)
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When an elephant lost her leg, he invented a prosthesis for her
![In the 1660's, German alchemist Hennig Brand thought he knew the secret to making solid gold: pee.](https://media.cnn.com/api/v1/images/stellar/prod/200803095411-02-gbs-phosphorus-restricted.jpg?q=x_60,y_0,h_1310,w_2327,c_crop/w_250)
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Did you know that phosphorus was discovered from ... urine?
![The people of Piplantri, India, have planted nearly 350,000 trees since 2006—all in honor of the girls born in their village.](https://media.cnn.com/api/v1/images/stellar/prod/191029095505-02-gbs-girls-trees-restricted.jpg?q=x_0,y_0,h_1080,w_1919,c_fill/w_250)
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This village in India plants 111 trees every time a girl is born
![No one in Hollywood has more acting credits than James Hong. Seriously, take a look at his IMDb.](https://media.cnn.com/api/v1/images/stellar/prod/200728095432-02-gbs-james-hong-restricted.jpg?q=x_30,y_0,h_1320,w_2345,c_crop/w_250)
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The actor with 600+ credits and counting