NOVA Official Website Lifes Greatest Miracle. Lifes Greatest Miracle. PBS Airdate November 2. NARRATOR People do all sorts of things to get attention. And why It. may be the last thing on his mind, but this mans body is working toward. Whether were thinking about it or not, our bodies want to make babies. And. our bodies are very good at it. Around the world about 3. But as ordinary as it seems, creating a new human being is no simple feat. Just think of it. No matter who you are, once upon a time you looked like this. From a single cell you built a body that has one hundred trillion cells. You. made hundreds of different kinds of tissues and dozens of organs, including a. How did you do it Today, we can look closer than ever before into the womb, into a cell, into. Not only can we see whats happening, but now were. Were uncovering the most intimate. NARRATOR You might think all the people on this beach are just working. But beneath all that sunscreen, under the skin, theres a. FF426900000578-3482967-image-m-68_1457476941812.jpg' alt='Miracle Run' title='Miracle Run' />Without even thinking about it, almost all the adults here. They cant help themselves. The urge to procreate. Why is this urge so universal At least some blame can probably go to this. DNAthe molecule that carries our genes, the chemical instructions for. DNA has run the show for more than four billion years for one main reason. The copies can get passed to a new. If youre a bacterium, you might be into cloningmaking exact replicas of. All your descendents have the same DNA and, except for an occasional. Its simple. It works. And genetically its. It can also be dangerous. If humans were all clones, everyone would have the exact same immune system. Miracle Run' title='Miracle Run' />Game Theory. Could Theo Epstein Perform a Miracle for the Democrats David Axelrod says his baseball management skills, honed in Boston and Chicago, could win for him. VkiyKLdI/hqdefault.jpg' alt='Miracle Run' title='Miracle Run' />Fortunately, theres sex, the method of choice for 9. Earth more complex than bacteria. With sexual reproduction, two. DNA. Most animals put it into sperm or eggs. If. the two can get together, a new being will be created, one thats different. Where theres sex, theres variety. And when it comes to survival of the. All this comes at a price. Sexual reproduction may be popular, but its also. To get an idea of how tricky, just take a peek inside a mans. Its packed with tiny tubes coiled into bundles. Stretched out they could. The Miracle Ride is Indianas largest and longest running motorcycle charity event. Hope happens when we rideOffers pediatric healthcare information on illness, injury, health, parenting, and safety of infants, children, and adolescents. Georgia. The Run It Like Its Hot Miracle Mud Run is back. Guaranteed as much fun as before. Even a professional photograph of you, or you and your. Miracle Caught On Camera, Girl Survives After Being Run Over By Train While 10 people die on the railway tracks everyday in Mumbai, a teenage girl survived miraculously. In times of desperation, we call on the Miracle Prayer for urgent help or healing. Inside all this tubing, the average man is churning out a. Thats about a hundred million new sperm every. And heres the tricky part. How is this possibleHow can one person produce so many different. The answer lies in the very special way we make sperm. In almost every cell of your body you have thirty thousand or more different. DNA called chromosomes. Ipswitch Whatsup Gold. Most cells. The Miracle Bamboo Bra contours to your shape with all day comfort and support, it has an easy front closure, and best of all, its machine washableExactly half of. They come in pairs. The only time they. Heres how it works inside a testicle thats making sperm. First, each. chromosome makes an exact copy of itself, keeping it attached at one point. They condense, creating an X shape. Now the chromosome partners get together. They cling so closely, big chunks. The cell. then divides twice, each time pulling the pairs apart. The final result is a. By itself, the cell is incomplete. But it still holds incredible promise. All this gene shuffling means that within a single species, there can be an. And the more diversity, the better the odds are. MELINDA TATE IRUEGAS This is my mom and dad and your mom and. SERGIO IRUEGUS And my mom and dad on their wedding day. You definitely. have your moms eyes. And you can see I definitely have my dads. MELINDA TATE IRUEGAS You do have your dads eyebrows. NARRATOR Melinda Tate Iruegas and her husband, Sergio, are. SERGIO IRUEGUS Heres Mom and Dad with me and my brother. MELINDA TATE IRUEGAS Yeah. SERGIO IRUEGUS My sister hadnt come along yet. But this is what our. Thats me. NARRATOR Their unborn child carries a mixture of genes not just. SERGIO IRUEGAS Thats like the spitting image. You look so much like. NARRATOR But which genes got passed on from whom right now is. SERGIO IRUEGAS Because here you are and this is what our little girl. I wonder if the baby will have the characteristic eyebrows. We call them the Iruegas. MELINDA TATE IRUEGAS Or that it wont have my dads nose. SERGIO IRUEGAS Your nose. MELINDA TATE IRUEGAS We talked about having children a lot. He would. say, Five, six. I was like, Well, lets start with one. Two, maybe. three. NARRATOR In their efforts to pass on their genes, Melinda and. Sergio pursued dramatically different strategies. Like most men, Sergio has. But Melinda created all her eggs when she looked like this, a fetus in her. Within a couple of months, she created several million eggs. And. then, the eggs began to die. At the age of 3. 1, Melinda may only have a few. But thats okay, because inside an ovary, as opposed to a. Every month, one of a womans two ovaries selects an immature egg cell to. Hundreds of support cells tend the egg, feeding it until. When its ready, the whole entouragethe egg along with its. Waiting for them is the open end of the Fallopian tube, which leads to the. Its tentacles capture the egg and pull it inside. The egg is swept. Download Cho Ramaswamy Books Pdf on this page. The egg has everything it needs to start a new life, except for one. DNA from a sperm. And it has to get it fast. If the egg is not. With sex, there will always be pressure to meet and impress a mate. When it. comes to actually choosing a partner, theres a lot to consider. For us, it. might be somewhat more complicated than picking the one that smells best, but. When love is in the air, the body can undergo some dramatic changes. Signals. from the brain speed up the metabolism of glucose. As a result, body. In a man. hormones cue blood vessels to relax, allowing the spongy tissue in the penis to. At the height of sexual excitement, millions of sperm are. The flood carries them into a fifteen inch long tube. Its only about a. They are immediately in peril. The vagina is acidic, so the sperm must escape. They start to swim, at least some of them. Even in a healthy man, 6. Like this one with two tails. For these guys, the journey is over. But what about the rest What are the chances that one tiny sperm will reach. Sperm are often portrayed as brave little warriors. Nothing could be. For every challenge the sperm face, success is, to a great extent, controlled. Take the sperms first obstacle, the cervix, passageway to the uterus. Most of. the time, its locked shut, plugged with mucous that keeps bacteria and sperm. But for just a few days a month, around ovulation, the mucous becomes. Arriving inside the uterus, the sperm are still about six inches away from. But undulations of the uterine. Even a sperm that reaches the tube in record time has no guarantee of. There may be no egg there. Ovulation could still be days. Its the slowpokes, caught up in the cilia lining the tube, who may have a. Its probably here that chemicals in the womans body alter the. Only those sperm that are altered can get a date with. The sperm are released gradually, over the course of a few days, so at. If all goes well, then farther up the tube theyll find the egg. But its. heavily chaperoned by support cells. And the chaperones are picky. Only some of. the sperm are let through. Those who make it will face yet another challenge. Underneath the cloud of. To fertilize the egg, the sperm must break through the zona. But even the. strongest cant do it by brute force alone. The egg demands a proper. Proteins protruding from the sperms cap must hook up precisely. If they match, the sperm is held. It sheds its outer coating. The final hurdle passed, the sperm still does not thrust its way into the egg. Rather, the membranes of the two cells fuse, and the egg draws the.