Lausanne-based FINA had to move the championships because the 2021 slot of July 16 to August 1 clashed with the new date for the Tokyo Games, which were postponed due to the COVID-19 pandemic.
The device helps players to invigorate their brains as they use their toes and muscles in their thighs while playing the game, researchers say.
The quake, which hit west of Kyushu Island at 0723 IST was centred at an 'extremely shallow' depth of 9 km below the ocean floor, measured 7 on the Richter scale.
The quake struck near Kumamoto city on the island of Kyushu at a depth of 11 kilometres, the Japan Meteorological Agency said, adding that there was no tsunami risk.
'The lessons learnt from the triple disaster have put Japan's energy future On the right path,' notes Dr Rajaram Panda.
The 6.5 magnitude quake on Thursday in the same region of Kumamoto brought down buildings, killing nine people and injuring about 800.
National Geographic has announced the winning photos of its popular Travel Photographer of the Year 2018 photo contest. The grand prize was awarded to Japanese photographer Reiko Takahashi, who captured an underwater photo of a humpback whale calf's tail. The winning photo, titled "Mermaid," was selected from over 13,000 entries received this year. Describing the moment she captured the scene, she said: "It was a special scene for me, to be able to take a photo of the calf, completely relaxed in gentle waters." Scroll down to see the full selection of winners.