What if Earth isn't the best planet for life?
Although Earth is the only known world that supports life, much of its surface is covered by harsh deserts, frozen wastelands, deep oceans, and environments where very little can survive. As astronomers continue discovering thousands of exoplanets, scientists are exploring an exciting possibility: could there be a Super-Earth that's even better for life than our own planet?
In this documentary, explore the fascinating concept of Planet Hestia—a hypothetical world with a stable climate, abundant shallow oceans, lush ecosystems, and ideal conditions for biodiversity. Learn how exoplanets are discovered, what makes a planet habitable, and why some scientists believe Earth may not be the ultimate home for life.
Whether you're fascinated by astronomy, astrobiology, space exploration, or the search for alien worlds, this video dives into one of the most exciting questions in modern science.
🌌 Topics Covered
Planet Hestia
Super-Earths
Exoplanets
Habitable Worlds
Astronomy
Space Exploration
Astrobiology
Alien Life
Earth vs Hestia
Science Documentary
#Space #Exoplanets #PlanetHestia #SuperEarth #Astronomy #Science #AlienLife #Astrobiology #Universe #SpaceDocumentary #Earth #Cosmos #NASA #ScienceFacts #Kurzgesagt
planet hestia,super earth,exoplanets,earth vs hestia,habitable planet,alien life,space documentary,astronomy,science documentary,astrobiology,space facts,earth,life in the universe,perfect planet,nasa,james webb telescope,galaxy,milky way,cosmos,space exploration,science facts,universe,better than earth,habitable worlds,space education
Although Earth is the only known world that supports life, much of its surface is covered by harsh deserts, frozen wastelands, deep oceans, and environments where very little can survive. As astronomers continue discovering thousands of exoplanets, scientists are exploring an exciting possibility: could there be a Super-Earth that's even better for life than our own planet?
In this documentary, explore the fascinating concept of Planet Hestia—a hypothetical world with a stable climate, abundant shallow oceans, lush ecosystems, and ideal conditions for biodiversity. Learn how exoplanets are discovered, what makes a planet habitable, and why some scientists believe Earth may not be the ultimate home for life.
Whether you're fascinated by astronomy, astrobiology, space exploration, or the search for alien worlds, this video dives into one of the most exciting questions in modern science.
🌌 Topics Covered
Planet Hestia
Super-Earths
Exoplanets
Habitable Worlds
Astronomy
Space Exploration
Astrobiology
Alien Life
Earth vs Hestia
Science Documentary
#Space #Exoplanets #PlanetHestia #SuperEarth #Astronomy #Science #AlienLife #Astrobiology #Universe #SpaceDocumentary #Earth #Cosmos #NASA #ScienceFacts #Kurzgesagt
planet hestia,super earth,exoplanets,earth vs hestia,habitable planet,alien life,space documentary,astronomy,science documentary,astrobiology,space facts,earth,life in the universe,perfect planet,nasa,james webb telescope,galaxy,milky way,cosmos,space exploration,science facts,universe,better than earth,habitable worlds,space education
Category
📚
LearningTranscript
00:04Earth seems like a paradise for life but it's actually kind of mid. Big parts of it are covered
00:11by hostile deserts of ice, fire, rock or darkness. Could there be a planet that's not just more
00:18suitable for life but ideal, so perfect for the emergence of life, filled with not just
00:24biomass but also biodiversity, that Earth is a barren desert compared to them?
00:32As we've begun to look deep into our galaxy, we've found a new and weird type of planet.
00:37Super Earths. Planets larger than Earth that have the potential to not only host life but
00:43to be super habitable. Let's take all the science on exoplanets we have and imagine a perfect
00:48world. Hestia, after the Greek goddess of the comfy home. The best possible planet for life
00:54in the universe. First of all, we want a perfect star. The perfect star for the perfect world.
01:02The perfect world needs a perfect star but that may not be a yellow dwarf like our sun because
01:07they die in under 10 billion years and keep getting hotter as they age. 70% of the window
01:13for life on Earth has already passed. Earth has a mere couple of billion years left before
01:18the sun ends it all. 70% of stars are red dwarfs. Pretty small and alive for trillions of years,
01:25basically forever. Since they're not that bright and hot, their habitable zones where water can
01:30be liquid are pretty close to them, which makes it very likely that their planets are tidally
01:35locked. One hemisphere a hot desert and the other an icy hell. Also, young red dwarfs tend
01:42to vomit deadly radiation that sterilizes their planets or boils their oceans away. The perfect
01:48stars for life might be orange dwarfs. In the Goldilocks zone between red and yellow dwarfs,
01:54their energy output is very stable. Radiation tends to be less aggressive and, most importantly,
02:01they live up to 70 billion years, giving life plenty of time to emerge, evolve and thrive. So,
02:08here's our perfect star, an orange dwarf, born three billion years ago in a calm galactic
02:14neighborhood. For the next tens of billions of years, it will be super stable. Among dead rock
02:20planets and massive gas giants, one planet is our super habitable super Earth, Hestia, where life can
02:26thrive like nowhere else in the universe. The perfect planet, a super habitable world. Hestia's radius
02:34is 1.3 times Earth's, so it has 70% more surface area, a lot more space for life. With
02:41almost twice
02:42Earth's mass and 20% more surface gravity, walking on it you'd feel 20% heavier. Unfortunately, it's a hot,
02:50dead desert. Like Mars and Venus today, it's still missing two things. Firstly, a magnetic field that
02:56protects Hestia from solar storms and the cosmic radiation that sterilizes its surface and blow its
03:02atmosphere away like poor Mars. So, deep inside, Hestia gets a massive metallic core spinning in a liquid
03:08mantle that creates a magnetic field of exactly the right strength for super strong protection. And Hestia
03:15needs plate tectonics to mix its surface around. Venus turned into a 470 degree hell because without
03:22tectonic plates breaking and mixing, the tension and heat below its surface unloads in apocalyptic volcanic
03:28eruptions. Continental plates moving into the depths also remove CO2 from the surface, which is great
03:35because excess CO2 makes the atmosphere heat up too much. And they bring up a vital mix of water, minerals
03:41and
03:42elements that life can feast on. We also have something for you to feast on. Our latest video game. We've
03:49been
03:49working on this game together with the amazing birds over at Tucana Interactive for almost three years. Starbirds is a
03:56relaxing factory building and resource management game in which you mine asteroids, collect resources,
04:02craft goods, and create brain-twisting interstellar production networks. Level by level, you guide your crew to
04:09new star systems, each with its own set of challenges. Frosty cold, scorching heat, and... Wait, is that an alien
04:18tentacle?
04:20Since we launched the game in early access last year, a lot has changed thanks to all the feedback we
04:25receive from those of you who've already played it. We continued the story campaign and added two whole
04:31new star systems, introducing many more levels, production buildings, and alien life. There's also
04:37a brand new free play mode that lets you travel beyond the story campaign and generate your own levels. And
04:44we
04:44also added controller support if you'd rather play on the couch or on the go with your steam deck. This
04:50is the second big update
04:51before we gear up for the grand finale. We're looking forward to your feedback and experiences and are now hard
04:58at work on the
04:59last big content update. The Starbirds full release. Grab Starbirds for a special early bird discount on steam now.
05:12Okay, now that the basis for life is set, let's see how the surface turns out. We still need to
05:18make a bunch of
05:18character choices to make Hestia super habitable. Each upgrade comes with trade-offs life has to work with. We want
05:26Hestia to have mild seasons that create migration, boom and bust cycles, and evolutionary pressure, so we tilt its axis
05:33slightly and give it 36-hour days. And four small moons that hang like pearls in the night sky. Moons
05:41are crucial
05:41because with the right resonance, they create stability, avoiding overly punishing disruptions.
05:47The perfect land. Wet. Isolated. Warm. Earth has one huge downside. Most of its land is bound in large
05:56continents, whose central areas are very far away from water, creating deserts with scarce resources and hostile
06:03environments. So for Hestia, we maximize coastlines and avoid megacontinence. We'll give it many
06:10fragmented continental plates, creating a geology that's ideal for producing long island arcs.
06:17Hestia is now an archipelago world with a few dozen continents and millions of islands of all sizes and
06:23shapes. All of its land has access to water, salt or fresh without a single desert, creating the maximum land
06:31surface area for life. Hestia's biomass on land is also supercharged because will make it 5 degrees
06:37Celsius warmer than Earth. This doesn't sound like much, but as we know, Earth has plenty of spaces that
06:42are uncomfortably cold for much of the year, while tropical rainforests have ideal conditions for life.
06:48On Earth, they hold more biomass than any other land ecosystem, and Hestia is nothing but tropical
06:55forests and ice-free polar regions. Hestia's islands have hundreds of thousands of unique habitats,
07:01with hundreds of thousands of little private niches to fill, each home to unique creatures
07:06that are ultra-specialized for it. All possible variations on a theme manifest in different species,
07:12one stranger than the next. On Earth, tropical forests like the ones in these islands house 50%
07:19of all species on just 10% of its land. The isolated tropical islands have given nature thousands of
07:25attempts at building funny tree-type things that densely cover Hestia. On Earth, plants are green to
07:32best catch energy from the sun, but with Hestia's orange dwarf, they take on darker shades to hoard the
07:37fainter light. We could spend hours diving into cacti forest islands, where slow-moving hunter plants
07:44shoot poison needles at screeching feathered lemurs, or the fungi forests of the high plateaus dominated
07:49by armoured centipede lizards. But we should move on to another ecosystem that Earth can only dream of,
07:57the sky. The best possible sky, another world to inhabit. Hestia's large mass holds gases much firmer
08:06than Earth, so its atmosphere is much thicker, with just under one and a half times the pressure,
08:10but much richer in oxygen and CO2. This could be catastrophic for life, because high levels of
08:17oxygen make wildfires more likely and more devastating. But since Hestia is so warm and humid,
08:23evaporation produces so much rain that wildfires never get powerful enough to wipe out ecosystems.
08:29The upsides are clearly worth it. On Earth, the size of animals that breathe by diffusion is limited,
08:35which might be a good thing for us. But on Hestia, all kinds of weird creatures can grow huge,
08:40like the four-legged insect megaphans, dominating the largest continent. All that oxygen also lets
08:46animals have a faster metabolism and sustain higher activity levels. Predators hunt more explosively,
08:53prey fleas more dynamically, especially in a completely new dimension conquered by life. Up.
08:59In Earth's thin atmosphere, flight costs a lot of energy, but in Hestia's super-dense air,
09:06it's super-cheap. Despite the higher surface gravity, animals need much smaller wings and less
09:12energy to stay afloat. Over billions of years, thousands of branches of Hestia's evolutionary tree
09:18have discovered flight, and the skies are full of flying animals of all sizes. Like this sky whale
09:25shooting through the clouds, swallowing millions of tiny bird-like critters. Enormous as they are,
09:31they never touch the ground except to lay eggs, and when they die. The thick atmosphere also does
09:36another thing really well, transfer sound. Hestia is not a quiet place. Anywhere you are,
09:44animals are communicating, warning each other, or screaming for mates. This created super-weird adaptations,
09:50like hunters not trying to sneak up, but masking their direction of attack with disturbing and
09:55distracting noises. But we haven't even talked about the largest ecosystem. The best possible oceans,
10:02as many edges as possible. Earth's oceans make up most of its surface, and are on average 3,700 meters
10:11deep,
10:11but sunlight can only reach 200 meters deep. This sunlight zone is the only place plankton,
10:17the basis for the food web can turn sunlight into sugar, so it's where 90% of marine species live.
10:2495% of the sea is in permanent darkness, much of it an abyssal desert. So we don't want Hestia
10:30to
10:31have as much water as Earth. We do want to cover most of its surface, but it should be shallow.
10:36Almost all of its oceans should be continental shelves 1 to 200 meters deep. Virtually all of the ocean,
10:42and its floor, is a sunlight zone. There are downsides to shallow oceans, of course. They heat and cool
10:48faster, which creates stronger seasons and more storms. But again, disruptions drive life to
10:54specialize and make it more diverse. Hestia's oceans house breathtakingly vast ecosystems. Corals form
11:02living megacities stretching over thousands of kilometers, home to trillions of animals competing for
11:08real estate, and forming complex relationships. Pseudo crabs and fish lizards, and whatever this
11:15thing is supposed to be. Bordering the megacities are kelp and algae colonies filled with life like
11:21tropical rainforests. But there's another biodiversity supercharger, coastlines, where land and sea
11:28ecosystems meet, nutrients mix, birds eat fish, and crocodiles hunt gorillas. Even if they occupy
11:35only 7% of the total marine area, they're home to more than half of marine life. Hestia's coastlines
11:41are 45 times longer than Earth's, creating niches for dozens of millions of species. A pretty mid-planet
11:49like Earth hosts some 9 million complex species. Hestia, with its huge surface area, super habitable
11:56conditions, and sheer endless ecosystems, could hold hundreds of millions. What about intelligent life?
12:05Well, our perfect planet has so many ecosystems and opportunities that it would probably develop
12:11sooner or later. Maybe even multiple times at once. Imagine a planet where different alien
12:17civilizations exist in parallel, each with their own empires of stone and wood, maybe metal and silicon.
12:23How different would their perspective on living things and the nature of life be?
12:28Would they try to eradicate each other? Respect nature more or less? On a planet where any wound
12:35you cut would be filled up in no time? What would they think of our desert planet with winters and
12:40ice,
12:41with a few specks of green? Would they look at space and say no thank you to planets that are
12:46so
12:47obviously inferior? We don't know if a planet like Hestia exists, but it actually could.
12:54Maybe among the quadrillions of planets in the universe, somewhere around a small and super stable
13:00orange dwarf, there's a place that's home to more life today than Earth has hosted in its entire history.
13:09Here at Kurzgesagt, we know a thing or two about helping people learn. For instance,
13:13for most of human history, the best way to learn something hard was to learn from someone who already
13:17knew it. On a perfect planet, every student would have access to a great tutor, but that simply hasn't
13:23been possible. Until now. Meet the new Brilliant. Brilliant just launched a world-class tutor,
13:29and his name is Koji. Like the best human tutors, Koji doesn't just give you answers,
13:34he guides you to find them yourself. You can ask him questions, have him clarify concepts,
13:39or break down problems. And when you get stuck, Koji helps you get unstuck. He can see and draw
13:45right on your screen, bringing concepts to life, helping you see different ways of approaching a
13:49problem and adapting in real time. While other breakthrough technologies simply think for you,
13:55Koji makes you a better thinker. Brilliant is already our favorite way to learn. Its curriculum is
14:01designed by experts from MIT, Harvard, Stanford, and Caltech, covering maths and coding from grade
14:065 through college and beyond. It's also perfect for summer break, helping students return to school
14:12even sharper than when they left. A perfect planet gives life the conditions to emerge. Brilliant gives
14:18minds the conditions to flourish. Click the link below to get started with Brilliant's tutor for free.
14:24You can also upgrade to premium to get full tutor support. And right now, Kurzgesagt viewers can get 20%
14:30off an annual subscription at brilliant.org slash nutshell.
14:37You want to listen to the beautiful soundtrack without my annoying voice? Well, it's up to you.
14:42Just select the audio track Interlingua down here and watch the video again as a music video.
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