The Seoul International Aerospace and Defense Industry Exhibition (ADEX) 2023 ended on the 22nd with the conclusion of its six-day schedule. A total of 200,00…

Have you ever taken a picture of an airplane flying in the sky? Sometimes it's hard to take a picture because the plane passes so fast, and sometimes it&#…

Light bulb hanging in the blue sky By the beginning of the evening, the sky gradually shows its blue figure. In a little more time, the blue sky will turn red.…