When two Olympic pools at Rio turned from azure blue to bright green earlier this week, people around the world were left scratching their heads. The answer is not – contrary to popular assumption – ...

Related video above from 2020: Poland opens world's deepest pool that has a depth of 148 feetA UK company is to build what it says is the world's biggest and deepest pool, in a new project backed by ...

Goodbye, green. Hello again, blue. Hope you can stick around awhile. Synchronized swimmers were greeted by clear blue water in the competition pool Sunday after officials worked through the night to ...

Until Sunday, the Olympic "Water Cube" in Beijing was best known for being blue and bubbly and bright at night. Now the Olympic swimming pool inside may get more attention. A dozen world and Olympic ...