For centuries, Peru's Rainbow Mountain remained a largely hidden gem. Now, thanks to some pioneering backpackers and their love of social media, news of the stunning scenery has spread far and wide.
Tourists gasp for breath as they climb for two hours to a peak in the Peruvian Andes that stands 16,404 feet (5,000 meters) above sea level. They're dead tired, but stunned by the magical beauty unfurled before them.
Celebrated German explorer Alexander von Humboldt was born 250 years ago. Far ahead of his time, he warned of the critical importance of protecting nature. Now Germany's president is following in his footsteps.
Moving to a "blue" economy is crucial for the sustainability in our world's oceans, say experts at the 5th World Ocean Summit happening in Mexico this week. But what is "blue economy" actually about?
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