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25 ways the world changed in 2015

Melissa Stanger,Tanza LoudenbackDec 31, 2015, 19:39 IST

Facebook/McDonald's

Last year was a year to remember: Three countries ruled in favor of same-sex marriage. We came closer than ever to editing genetically linked diseases out of our DNA. Taking action to prevent gun violence is a bigger priority. And, after years of anticipation, McDonald's finally launched all-day breakfast.

Yes, 2015 was one for the books. It wasn't all good, but the world changed in many ways that will continue to shape our future.

Keep scrolling to see 25 ways the world changed in 2015.