the evk2cnr laboratory, the "italian pyramid " research center, lobuche, everest base camp trek, nepal

nepal asia himalayas himalaya everest base camp ebc trek trekking expedition journey sagarmatha khumbu scenery climbing chomolungma nepalese himalayan mount ice panorama rock mountain summit cloudy valley nature mountaineering lhotse climb nuptse lobuche peak altitude hiking mehra patthar travel cnr evk2cnr research center italian pyramid weather climate climatology lab laboratory