Kristena

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User for 3 years | Last online 3 years ago (show activity)

3

@Kristena · 3 years ago

Causes of headache after eating !!

The causes of a headache after eating are as follows: 1. Low blood sugar level Low blood sugar is one of the most important causes of headaches after eating, as it causes a migraine or another type...

3 likes · 2 comments

@Kristena · 3 years ago

The Black Holes

What are black holes, and is it true that the laws of physics collapse inside black holes? Why is it black and what happens to us if we enter a black hole ... In this article, I will answer these ques...

4 likes · 0 comments

@Kristena · 3 years ago

What is at the borders of the universe ??

The limits of the universe: The universe is expanding with continuous acceleration, which means that the speed of the universe's acceleration at some point exceeds the speed of light. From our perspe...

3 likes · 0 comments

@Kristena · 3 years ago

The European Space Telescope "Euclid" will observe the universe in a panoramic view !!

The large-scale field observatory, which begins operations in 2022, will be one of the three new generation observatories designed to unveil dark energy, dark matter and other cosmic mysteries. When...

0 likes · 1 comments

@Kristena · 3 years ago

We all know electric cars, but electric airplanes ?!!

In 2019, air transport was responsible for 2.5% of global carbon emissions, and that proportion could triple that by 2050. Although some airlines have begun to compensate for their contributions to...

3 likes · 2 comments

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