@Kristena activity
3 years ago: gave thumbs up to the article
The king and the curmudgeon
3 years ago: commented on the article "Causes of headache after eating !!"
I hope you don't feel bad again.
3 years ago: gave thumbs up to the article
Prescription medications ... some are addictive !!
3 years ago: published the article
Causes of headache after eating !!
3 years ago: gave thumbs up to the article
Why do birds sing at dawn?!
3 years ago: published the article
The Black Holes
3 years ago: gave thumbs up to the article
There is happiness in life, but you have to know how to find it !!
3 years ago: published the article
What is at the borders of the universe ??
3 years ago: published the article
The European Space Telescope "Euclid" will observe the universe in a panoramic v...
3 years ago: commented on the article "We all know electric cars, but electric airplanes..."
> I've always been enthusiastic about electric planes. The main difficulty is that if a plane were to run fully on batteries, those batteries need to weigh a ton.
Yes, this is one of the most impor...
3 years ago: published the article
We all know electric cars, but electric airplanes ?!!