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The angels of mercy Razan Najjar were killed in Gaza

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صورة
Medical volunteer Razan al-Najjar, 21, died on Friday at the border with the Gaza Strip. Ashraf al-Qadra, a spokesman for the Ministry of Health, announced the martyrdom of Razan al-Najjar on the eastern border of Khan Younis, while transporting them to the wounded on the border. Razan al-Najjar, a 21-year-old Palestinian girl, is happy to carry out a large-scale march on the Khuza'a border east of Khan Yunis in the southern Gaza Strip. Najjar was detained from 7 pm to 10 pm to save the wounded and suffocate.
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The last photo taken by the German

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صورة
The last photo taken by the German photographer and journalist (Rains and Wilhamson) After catching the little bear in his hands, he temporarily adjusted his camera to take the picture after 10 seconds. He took the picture at the 10th minute and kept the camera in its final shape and lost his life immediately afterwards
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Vehicles reach the speed of light in 2020

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صورة
Like the speed of anything else, the speed of light is the distance traveled by light at a given time. Per second, light cuts (299,792,457.4 meters), about 300 thousand kilometers per second, very high speed. Nature, nothing can move faster than the speed of light. There have been many attempts to measure the speed of light that began long ago, but it was not easy, and it was not possible to get accurate value for the speed of light as we have now Galileo Galilei asked two of his aides to stand on two separate islands at a distance of 10 kilometers, each with a covered lantern. If one of them opens the lantern, the other opens the lantern when he sees the light from the first lantern and records the time between the revelation of the lantern. I will reveal the second lantern and we will have the time needed for the light to cut the distance between the mountains. But he was instantaneous, unable to record time, prompting Galileo to realize that it was impossible to measure the speed ...
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