Explain the phenomenon of dark black in the daytime in Ha Long
At about 9:00 am to 9:00 pm on April 3, the area of Hon Gai (Ha Long, Quang Ninh) suddenly occurred strange phenomenon: the sky suddenly darkened, causing people to turn on theDecode the 'mystical' thing in the sky of Vietnam
In recent years, we have always seen some amazing natural phenomena appear in the sky of Vietnam.