Why did Thanos kill half of living things in the Universe instead of doubling the resources of the Universe?

Because Thanos is a dictator, and as such, he shields his reasoning behind an echo chamber instead of finding out people who can challenge his beliefs. In fact, if the The Black Order had more critical thinkers, they would have told him that not even doubling the resources of the Universe would have serve any purpose, since it is a very naïve economic fallacy.

Where do babies come from?

Human babies, just as many other animal species, are the result of the union of two reproductive cells. Each one of them carries within the genetic information of each provider, also known as “parent.” This mixture, combined with nutrients and storage from female homosapiens, will result in the development of a new individual who will contain a random (to the best of our knowledge) combination of 50% of genes from provider #1 and 50% of genes from provider #2. To know more about this fascinating process, you may want to consult Google or a biology book. Just be mindful of fake news and go for reputable, trustworthy sources.

Why is the sky blue?

Light from the sun is white, which means it contains the whole range of visible colors available for human vision. The shortest light wavelength is perceived by humans in blue hues, which is warmer; the longest light wavelength is perceived as red or colder (though it might seem counterintuitive for homo sapiens, it a tight, active wavelength is considered “warm”, while a “colder” one is a more open, less active wavelength). That way, gas molecules and particles in the air of a clear day with no clouds can “break” the tighter light wavelengths more easily, which causes the blue hue to “spill” and occupy the visible range of daylight. Therefore, when rotation of the Earth causes the sun to be seen closer to the horizon, the light must pass through an even denser atmosphere to reach the photo-sensory receptacles of homo sapiens, which causes even more blue light to break during its zenith. This causes the more red-like, resistant hues of light to be more visible.

What causes tidal waves in the ocean?

Gravitational waves between the Earth and the moon. The ocean, being made mostly of water in liquid state, has a much greater capacity to deform without losing its molecular bonding. This phenomenon is called viscosity. The viscosity level of water in liquid state allows it to expand when reacting to the gravitational pull of the moon, which causes to rise, forming tidal waves. To a lesser extent, the Sun also has a gravitational pull on our planet’s liquids.

Why is a ring of light sometimes visible around a full moon?

Clouds are made of both vapor (water in gas state) and small crystal particles of ice, so small they float in the atmosphere. Moonlight, which is reflected from the sun, goes through these clouds and its crystals, which is redirected in a process called refraction. Therefore, the effect of a ring of light is caused by the refraction of millions of tiny crystals floating in the sky, changing the direction of light in all directions, one of these coinciding with the photo sensible receptacle, also known as eye, of the individual watching the moon.

I read that the Earth is flat accelerating at a constant speed and a wall of ice is at the edge of this disc guarded by NASA, which is killing anyone who tries to get close to reveal this dark secret. Is this true?

No.

What about glass being liquid instead of solid? This also must be false, right?

Glass is a liquid.

How is this possible? Glass is solid! It breaks!

Glass is a liquid with a viscosity level so low that from the perspective of homo sapiens (and practically everything else in the solar system) could be considered a solid. If one could film a glass of wine for billions of years and replay the film in a time lapse, one would see how the cup “melts” even at low temperatures. In fact all matter, even rocks, have some level of viscosity. This is because concepts like liquid, solid, gas or plasma is nothing more than labels made by humans in an attempt to interpret and make sense of reality in a more practical way.