International Day of the Worlds Indigenous Peoples © SL_Photography/Getty Images

Today, we are celebrating the heritage and culture of native populations worldwide. There are some 5,000 Indigenous cultures in 90 countries around the world, from Samoa and Greenland to New Zealand and Nepal. One of the major challenges they face is the loss of their languages: it"s estimated that of the 4,000 Indigenous languages in the world, around 2,600 are in danger of becoming extinct.