Guys can u answer these??ok if u can answer then alright. 1)Are we all alone in universe?
2)Why do placebos work?
3)Why do humans dream?
4)How does gravity work?
5)What's on the other side of black hole?​

“Two possibilities exist: either we are alone in the Universe or we are not. Both are equally terrifying.” So said sci-fi author Arthur C Clarke. We’ve been fascinated by the idea life may exist elsewhere, and for over 50 years the Search for Extra Terrestrial Intelligence (Seti) has been scanning the galaxy for messages from an alien civilisation to no avail.Reduced anxiety – taking the placebo and expecting to feel better may be soothing and reduce the levels of stress chemicals the body produces, such as adrenaline. Brain chemicals – placebos may trigger the release of the body's own natural pain relievers, the brain chemicals known as endorphins.Most dreaming occurs during REM (rapid eye movement) sleep, which we cycle through periodically during the night. Sleep studies show our brainwaves are almost as active during REM cycles as they are when we're awake. Experts believe the brainstem generates REM sleep and the forebrain generates dreams.The answer is gravity: an invisible force that pulls objects toward each other. ... So, the closer objects are to each other, the stronger their gravitational pull is. Earth's gravity comes from all its mass. All its mass makes a combined gravitational pull on all the mass in your body

The figure is not necessarily a parallelogram because only one diagonal is bisected and only one pair of sides is congruent.