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Most exoplanets lying in the habitable zones around stars are in fact inhospitable to plant life as we know it. That is according to a new study from microbiologists and astronomers at the University of Georgia who say that taking into account the light a planet receives as well as its ability to hold liquid water is a better definition of whether life could exist on other planets.

The Habitable Zone (HZ) is traditionally defined to be the range of distances around a star where an exoplanet can support liquid water on its surface. Too far, and the planet remains frozen like Mars. Too close and the oceans evaporate, as happened to Venus. The zone in the middle is neither too hot, nor too cold, but just right – the so-called “Goldilocks zone”.

Nothing certain is known about the properties and requirements of alien life. However, there are generally two schools of thought in astrobiology. One is that evolution on other planets can figure out ways to sidestep seemingly insurmountable barriers to life as we know it, while others claim that life is everywhere bounded by the same universal physical principles, and can thus only operate a certain way, similar to as on Earth.

But we expect that it’s in that first tiny fraction of a second that the key features of our universe were imprinted.

The conditions of the universe can be described through its “fundamental constants”—fixed quantities in nature, such as the gravitational constant (called G) or the speed of light (called C). There are about 30 of these representing the sizes and strengths of parameters such as particle masses, forces, or the universe’s expansion. But our theories don’t explain what values these constants should have. Instead, we have to measure them and plug their values into our equations to accurately describe nature.

The values of the constants are in the range that allows complex systems such as stars, planets, carbon, and ultimately humans to evolve. Physicists have discovered that if we tweaked some of these parameters by just a few percent, it would render our universe lifeless. The fact that life exists, therefore, takes some explaining.

The first 2 minutes includes the best layman description of how ChapGPT works that I’ve heard yet:


Ready to blast off into a new world of gaming? In this exciting video, we’re taking AI to the next level as we install ChatGPT as a co-pilot in my SimPit game station. But this isn’t just your average AI installation — get ready for a hilarious space adventure as we explore the ups and downs of integrating ChatGPT into our gaming setup.

But before we launch into the fun, we’ll start by demystifying web APIs and explaining what AI is all about. Then, it’s time to dive into the installation process and see just how “easy” it is to set up ChatGPT as your very own AI co-pilot. You’ll learn all about the web APIs used to connect ChatGPT to your SimPit and get a firsthand look at the benefits of having an AI co-pilot by your side during gameplay.

While the scientific debate about the origin of water on our planet remains open, the truth is that relative to its size, Earth is more like a desert compared to other celestial bodies in our cosmic neighbourhood. Estimates vary, but there could be as much as 50 times more liquid water in the solar system than is found on Earth—an astonishing revelation that would have sounded absurd just a few decades ago. And scientists are eager to send spacecraft to this extraterrestrial water in the hope of discovering conditions suitable for life.

Apart from Earth, the inner solar system—containing the four planets closest to the Sun—is largely devoid of liquid water. On Mercury and Venus liquid water simply boils away, while on Mars any liquid water would quickly freeze or evaporate due to the low atmospheric pressure and temperature. Although there is some intriguing evidence that liquid water may exist beneath the Martian southern polar ice cap, the amounts would be very small compared to those found on Earth.

Paradoxically, to find to find an unexpected abundance of liquid water, we must venture into the frigid depths of the outer solar system, far from the warmth of the Sun. There, deep beneath the frozen surfaces of moons orbiting the gas giants Jupiter, Saturn, Uranus and Neptune, scientists have found strong evidence of vast oceans. But how can water remain liquid in such an extremely cold environment, where the Sun is only a faint glow in the sky and the warmest surface temperatures are always well below zero?

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Do you know why humanity still doesn’t have colonies on the Moon or Mars? Because the big companies that might’ve invested their money in building the said colonies are not sure when they’ll get their investments back and start making a solid profit. Well, at least that’s one of the reasons.

But the cheaper space flights will get and further the technologies that can help cost-efficiently settle on other planets will develop, the more countries, billionaires, tech giants, startups and institutions will get into the space race, whose finish line is right on the Red Planet. Why are they reluctant to do this? Are they afraid of future cataclysms? Do they know something we don’t? Are they dreaming of claiming the title of pioneers? Or hoping to mine rare metals in the asteroid belt?

Watch this video to find out all about the whens and hows of life on Mars, as well as about its outcomes, including a new round of human evolution and the possible demise of the planet itself! Wheels up!