National Geographic Society has installed the "world's highest weather station" on Mount Everest at an altitude of 8,830 metres to automatically measure various meteorological phenomena.
The International Day of Light is being celebrated on 16 May each year, the anniversary of the first successful operation of the laser in 1960 by physicist and engineer, Theodore Maiman.
Dr Tedros Adhanom Ghebreyesus was re-elected as WHO Director-General for a second five-year term by WHO Member states during the 75th World Health Assembly.
EXAMIANS