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Journey with us into the unseen realm of Dark Matter and Dark Energy, the elusive entities that shape the universe. Discover their elusive nature, profound impact on cosmology, and the quest to unravel their mysteries. ---- Transcript: Greetings, universe explorers! Today we venture into the invisible universe, the realm of Dark Matter and Dark Energy. While unseen, these elusive entities shape the cosmos, influence the growth of galaxies, and propel the universe's expansion. Join us as we explore these cosmic conundrums. Dark Matter, first theorized in the 1930s by Swiss astrophysicist Fritz Zwicky, is a form of matter that neither emits nor interacts with light or any other form of electromagnetic radiation. We know it exists not by seeing it directly but by observing its gravitational effects on visible matter. Dark Matter's gravitational pull influences the formation and shape of galaxies. It creates the cosmic scaffolding upon which galaxies are built, forming vast, web-like structures known as the 'cosmic web.' Yet, despite its profound impact, we still need to learn what Dark Matter is made of. Many theories propose that it consists of undiscovered subatomic particles. Experiments on Earth and in space are actively seeking these elusive particles. Gravitational lensing, where the gravity of massive objects distorts the path of light, is one tool astronomers use to map the distribution of Dark Matter in the universe. These 'cosmic telescopes' reveal Dark Matter's pervasive presence and role in sculpting the universe's large-scale structure. Now let's move from the enigma of Dark Matter to the even more perplexing phenomenon of Dark Energy. First proposed in the late 20th century to explain the universe’s accelerated expansion, Dark Energy is a form of energy that permeates all of space and tends to increase the universe’s rate of expansion. Dark Energy constitutes about 68% of the total energy in the observable universe, with Dark Matter making up about 27%. The rest - everything we can see, from galaxies and stars to planets and people - makes up a mere 5%. The discovery of Dark Energy was one of the most significant shocks in physics. In the 1990s, two teams of astronomers were studying distant supernovae to determine the rate at which the universe's expansion was slowing down. Instead, they found the opposite - the expansion was speeding up! This revelation earned the teams the 2011 Nobel Prize in Physics. One explanation for Dark Energy is the Cosmological Constant, a term introduced by Einstein in his field equations of general relativity. Einstein later abandoned it, calling it his 'biggest blunder,' but discovering the universe's accelerated expansion brought the Cosmological Constant back into play. Other theories propose that Dark Energy could result from quantum fluctuations in space. According to quantum mechanics, 'empty' space isn't empty but filled with temporary 'virtual' particles popping in and out of existence. This 'vacuum energy' could be responsible for the universe’s accelerated expansion. The existence of Dark Energy has profound implications for the universe’s future. Suppose its density remains constant, as the current evidence suggests. In that case, the universe will continue to expand at an ever-increasing rate, leading to a 'Big Freeze' or 'Heat Death' scenario, where the universe ends in a state of maximum entropy. The study of Dark Matter and Dark Energy represents the frontier of cosmology. Projects like the Dark Energy Survey and the Euclid space telescope are mapping the cosmos in unprecedented detail to uncover their mysteries. Ground-based experiments, like those at the Large Hadron Collider, are searching for Dark Matter particles. As we conclude our journey into the unseen universe, let's appreciate the profound mystery and beauty of Dark Matter and Dark Energy. While still enigmatic, these invisible entities are fundamental to our understanding of the universe. They remind us that the cosmos is far more mysterious and wonderful than we could imagine. In our quest to uncover the universe's secrets, we must remember the words of physicist Richard Feynman: "The universe is under no obligation to make sense to you." And yet, our pursuit of understanding continues, driven by our insatiable curiosity and passion for exploration. So, until next time, keep looking up and never stop wondering.

The #beaver lives in streams, swamps, and ponds and builds dams from tree branches, stones, and clay. It is capable of constructing the most complex structures on river banks. Its strong teeth are its main tool for performing this arduous task, as it relies on the teeth to bite off tree branches and twigs. Beaver builds dams up to tens of meters high. For example, the Alberta Dam in Canada, which is 850 meters long, was made by beavers.

Turtles are an order of reptiles known as Testudines, characterized by a shell developed mainly from their ribs. Modern turtles are divided into two major groups, the side-necked turtles and hidden neck turtles, which differ in the way the head retracts. There are 360 living and recently extinct species of turtles, including land-dwelling tortoises and freshwater terrapins. They are found on most continents, some islands and, in the case of sea turtles, much of the ocean. Like other reptiles, birds, and mammals, they breathe air and do not lay eggs underwater, although many species live in or around water. Genetic evidence typically places them in close relation to crocodilians and birds.

Children can have some extremely weird feelings of fear. They usually fear loud noises, the dark, weird-looking monsters lurking under the bed strangers coming into the house, big dogs or just some imaginary things. The list is as long and as versatile as there are children in this world. However, these fears are just a natural part of a childhood. The girl in this video, for example, gets visibly shaken by her new toy - a talking hamster!

If you haven’t hit your daily quotient of bunny videos yet (and, let’s face it, you can never have too many bunny videos in your day!), then this is a video you’ll definitely want to check out. The sweet rabbit in this video clearly adores getting attention from his human caretaker, and watching him snuggle sweetly into his human’s palm as he receives an affectionate stroking is about as soothing and uplifting a break in your day as you’re going to find anywhere. The adorable little lagomorph featured in this video is clearly a lop-eared bunny.

If you didn’t know there are 21 varieties of cockatoos. These parrots are all of the Australasian origin extending from the Philippines New Guinea and Australia. The bird in this clip is a white cockatoo also known as a cockatoo. When it is sensed the feathers on its head rise to form a crown which makes it very distinctive among other birds. If their striking appearance doesn’t do the job then their goofy show most certainly will.

They clean up the planet for us, pollinate the plants we depend on and provide the bases of the food chain supporting all life including ourselves. With millions of years of fine-tuning, they are miniature marvels that the world just can’t live without

The highest mountains on Earth are home to snow leopards, golden eagles, mountain goats, barnacle goslings and gelada monkeys. But only the toughest can endure the extreme weather, scarce food and limited oxygen on these peaks. Using new technology to showcase never-before-filmed animal behavior, Hostile Planet provides unique access to one of the most extreme environments on the planet

Animals are what makes our planet so special! Enjoy this 4k Scenic Relaxation film to witness the majestic wildlife of our incredible earth. From the Bengal Tigers of India, to the animals of Africa's savannah, our planet is blessed with so many amazing species. What is your favorite animal?

From heart-pounding chases, hilarious antics, to the downright bizarre, we take you through some of our all-time favourite natural history moments.

There are very few experiences that can compare to an African safari adventure. Enjoy a meticulously shot wildlife film to witness the magic of the villa. African safaris are filled with some of the world's most amazing wildlife. What is your favorite safari animal?

Experience the tranquility of a heavy rainfall with our video, "Rain sound with thunder sounds ㅣ Heavy rain for sleep, study, relaxation and meditation." Immerse yourself in the soothing, consistent sound of rain, punctuated by the occasional roll of thunder. This video has been specifically designed to provide an ambiance ideal for sleep, study, relaxation and meditation. The heavy rain sound creates a calming white noise, perfect for drowning out distractions, promoting deep sleep, enhancing focus for study or simply for pure relaxation. We’ve captured the raw essence of nature's most soothing sound - heavy rain. Whether it’s been a long day or you just need a moment to yourself, our video offers a unique kind of relaxation that can only be provided by nature. Don't forget to like, subscribe and comment about your experience. We would love to hear how this heavy rain sound video has helped you in your daily activities, sleep routine or meditation practice. Hit the bell icon to get notified about our latest releases. Stay tuned and immerse yourself in this serene auditory experience.