One of Hinduism's most revered traditions is a trip to the Ganges River. But the sacred river may vanish as the Himalayan source, the Gangotri glaciers, melt with rising temperatures. With the current rates of melting, the glaciers could vanish by 2030 – and scientists predict that, in the long term, the Ganges will become a seasonal river that relies on monsoon rains. An immediate effect of...