• Gifting Body Parts For Sex: How Nursery Web Spiders Seduce a Mate
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    Gifting Body Parts For Sex: How Nursery Web Spiders Seduce a Mate

    The differences in reproductive values of sperm vs eggs, and the resulting conflicts of interest between males who want more sex, and females who have had enough, have resulted in the evolution of some pretty extravagant strategies for males to be reproductively successful. After all, if a female has enough sperm in her storage organ she is probably not interested in receiving any more. And this is bad news for any guy who has yet to make his own sperm deposit. So, what can he do to convince a lady that his sperm might be worth an extra roll in the hay? Presents! Male nursery web spiders bring gifts to…

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    How does a Spider make its web? | #aumsum

    It’s AumSum Time Hi guys. Can you guess the title of my next video? My horse fainted. Somebody help. Just kidding. Hurry up. Write your guess in the comments section below. How does a spider make its web? No. On its underside, a spider has organs called spinnerets that spin silk threads. First, it connects two end points like two branches with silk threads, forming a bridge. It then releases a loose thread. From its center, it adds a new thread, pulling it to form a Y shape. It joins the 3 points to form a frame. Then lays radial threads till the web becomes strong enough. Finally, from the…

  • Bacteria (Updated)
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    Bacteria (Updated)

    Captions are on! Click CC at bottom right to turn off. When I was a little kid, my parents would let me take my favorite set of dinosaurs into the tub…probably to persuade me into taking a bath. I remember my dinosaurs well! In fact, I used to know all of my dinosaurs. I had epic dinosaur battles. Sometimes my sister would play with them, too…just…a little differently. Anyway, I remember that one day, unfortunately, my favorite stegosaurus lost his head. I mean, literally, it just popped off. And while I was determined to get my parents to fix it, we discovered that there was stuff growing in the toy.…

  • Classification
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    Classification

    Captions are on! To turn off, click the CC button at bottom right. Follow the amoebas on Twitter (@AmoebaSisters) and Facebook! There are a lot of animals that I have always thought are cool. Salmon, hairless guinea pigs, iguanas…silkie bantam chickens… But one day in my 7th grade science class, my teacher told us we would get to see one of the most amazing animals ever in class. A hydra! And I have to confess what I imagined in my head…and what actually was reality…was a little different But, I’m kind of used to that. Turns out hydra are pretty cool. Hydra are animals that are very small—a few millimeters…

  • Archaea: The Hidden Domain of Life
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    Archaea: The Hidden Domain of Life

    You know what plants and animals are, and you’ve probably heard of bacteria, fungi, and even protists. But have you ever heard of archaea? Just like plants and animals, archaea are a category of organisms. If you haven’t heard of them, don’t worry– you’re not alone. Archaea as we understand them today weren’t categorized until the 1990s and have been slowly making their way into textbooks since. That means they may not have been in your biology textbook at all. And even if they were, you might not have learned about them in much depth. But archaea should not be written off as the forgotten organisms. They are, after all,…

  • Three Domains of Life Biology [HD Animation]
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    Three Domains of Life Biology [HD Animation]

    Living organisms [are] divided into three major groups the Bacteria the Archaea and the eukaryotes Called domains is based on comparisons of Nucleotide sequences of ribosomal rNA Bacteria and Archaea are similar in cell structure and are referred to as prokaryotes These two groups can be distinguished by a number of important characteristics all higher organisms Protista plants fungi and animals share a common cell structure and are referred to as Eukaryotes eukaryotic cells Contain a nuclear membrane Endoplasmic reticulum and organelles such as mitochondria and chloroplasts whereas prokaryotic cells do not in Bacteria [and] Archaea protein synthesis occurs on 70s ribosomes made up of 30s and 50s subunits, Whereas…

  • Are Those Your Lips or Feet? How Your Brain Rewires Itself After Amputation
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    Are Those Your Lips or Feet? How Your Brain Rewires Itself After Amputation

    Even though it looks like a random, bumpy mess, your brain is incredibly organized. Your brain has its own version of google maps for navigating the world around it — but just how flexible are these maps to changes? Every sound you can hear or touch you can feel is because neurons in a specific part of your brain are firing. Our brains are organized “topographically”so that we can keep track of where things are happening, … that means we can tell the difference between a touch on the arm or a touch on the face. By observing people’s brains in different imaging machines, neuroscientists have largely mapped out touch,…

  • Are You Under 24? Science Says You Still Have the Brain of a Teen
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    Are You Under 24? Science Says You Still Have the Brain of a Teen

    We define adolescence as the years between childhood and adulthood. The exact age might depend on the country — things like the age you can vote or drink — but it’s roughly defined as being from age 10 to 19. But, a new study is suggesting that adolescence should end as late as 24 to account for the full range of human development. WOOOOOO aww wait i’m still an adult. Compared to other animals, humans give birth to pretty helpless babies. Newborn sea turtles can find the ocean on their own and giraffe calves can walk unaided within hours of being born… Whereas, we can’t even hold our own heads…

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    We’re Using Stem Cells to Reverse Baldness and It’s Actually Working

    Some very hairy mice are bringing us another step closer to un-LOCKing a way to regenerate a full head of hair. Did somebody say a pun?! About 50% of men and 25% of women experience at least partial hair loss by the age of 50, whether due to age, medical treatments, or disease. Current options for those looking to reverse this loss include things like medications that may slow hair loss and transplants from hair follicles elsewhere on the body. But neither have the often desired effect of restoring a thick and full volume of hair. Researchers have been optimizing techniques for culturing “hair follicle germs” in a dish for…

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    Your Skin Cells Could Make a Baby, Will This Be the End of Infertility?

    We all know where babies come from. An egg is fertilized by sperm and the resulting zygote needs to be implanted in a uterus so it can grow and divide. The key here is the union of the gametes: sperm and egg. This means same-sex partners, or partners who are unable to provide gametes themselves, need to rely on donors. But what if that wasn’t the case? What if we could just generate gametes from the partners? Soon, we might be able to. The method is called in-vitro gametogenesis. It involves converting adult cells into lab-made eggs and sperm cells that can combine to create a zygote. This could pave…