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Sustainability Blog

human elementNational Geographic photographer James Balog shows viewers why we, as a society, can no longer turn a blind eye to the drastically changing world around us in his compelling documentary, “The Human Element”. This visually stunning film chronicles the complex relationship between humans and nature.

The Human Element features iconic subjects who are often overlooked victims of climate change. Balog visits Tangier Island, a fishing community in the Chesapeake Bay which is facing the imminent reality of sea level rise threatening their island’s future. Viewers meet Yadira Sanchez and her three children in Denver, Colorado, all of whom suffer from asthma, and attend a special school on a hospital campus for children struggling to breathe. Balog joins a Cal Fire strike team on the frontlines of the most expensive wildfire in California history to witness how human activity is changing how wildfires behave. And he ventures deep into Kentucky coal country, meeting unemployed miners finding hope from a new source.

Please join us for a free viewing of this film. Co-sponsored by the local chapter of the Citizens’ Climate Lobby and the City of Thousand Oaks.

February 11, 2020 6:00 PM
Grant Brimhall Library Community Room
1401 East Janss Rd., Thousand Oaks

 For more info, click here.
For reviews, click here and here.

Link to our local chapter: https://citizensclimatelobby.org/chapters/CA_Conejo_Valley/

 

Return to full list >>Sours: https://www.toaks.org/Home/Components/News/News/8116/3338?arch=1&npage=4

Human Evolution 101

The origins of humankind have long fascinated scientists and the public alike—but the topic can get confusing. Here are answers to a few common questions.

Why are scientists certain that human evolution happened?

For a number of reasons. We share nearly 99 percent of our genetic sequence with chimpanzees and bonobos, which strongly suggests we share a common ancestor. And there are thousands of fossils documenting progressively more human-like species in the evolution of our lineage after it split from the other great apes and later from chimps and bonobos.

Biologists have actually observed evolution happening in other species, both in the field and in the lab—the recent emergence of antibiotic-resistant microbes is a form of evolution. And animal breeders make evolution happen all the time—think of the tremendous variety of dog breeds that have been created from wolves.

Is evolution at odds with the Bible?

Yes, if you think the Bible has to be interpreted literally. Evolution contradicts the Genesis story that God created all organisms in their present form. But you can believe in God without believing that the Bible is literally true.

So how does evolution work?

The DNA that makes up our genes, and those of every organism on Earth except some viruses, is subject to random mutation. Every now and then one of those mutations affects an important trait, such as an animal’s coat color or a particular behavior. Animal breeders selectively breed animals that have the traits they want; that’s artificial selection. In nature, the selection is done by the animal’s environment—and by the opposite sex.

If an animal is born with a coat color that offers more protection from predators, for instance, it could survive longer and produce more offspring. If a longer courtship display is more appealing to mates, that too could lead to greater reproductive success. Over time, such favorable mutations spread through a population and change how it looks. Over enough time, the process can even produce new species.

A trio of other Homo species, all first appearing in the fossil record around two million years ago, argues against a linear progression toward humanness—a message underscored by H. naledi’s unique blend of primitive and advanced traits.

What are the major milestones in human evolution?

The human lineage diverged from that of apes at least seven million years ago and maybe as long as 13 million years ago. The earliest undisputed members of our lineage to regularly walk upright were the australopithecines, of which the most famous is Lucy’s species, Australopithecus afarensis. (Lucy herself is dated to 3.2 million years ago.) The oldest known fossil attributed to our genus, Homo, dates to about 2.8 million years ago and was reported just this year. The ability to make stone tools was once thought to be the hallmark of our genus. But the oldest stone tools are now thought to be 3.3 million years old. Either they were made by australopithecines like Lucy—or scientists simply haven’t yet found the early form of Homo that made them. Like australopithecines, early Homo species, such as H. erectus and H. habilis, walked on two legs.

There's considerable debate over when our ancestors first harnessed fire—it may have been anywhere from 1.8 million to around 800,000 years ago. According to one theory, the invention of cooking allowed us to gain more energy from meat, which fueled the dramatic evolution of the human brain. Bigger brains and more dextrous hands in turn were the prerequisite for the developments that set humans apart, including complex language, art, and agriculture, all of which emerged in the past 100,000 years.

Where did all this happen, and why does it matter where?

Both genetic and fossil evidence show that until relatively recently, human evolution happened in Africa. Whether the genus Homo first emerged in southern or in eastern Africa remains unclear. Knowing where our species evolved matters because the environment it adapted to helped shape the genetic makeup we still carry with us today. Where we came from is the first chapter in the long story of how we got to where we are now.

Around 60,000 years ago—again according to both genetic and fossil evidence—modern humans migrated out of Africa and began colonizing the world. Genetic evidence suggests that soon after leaving Africa, they interbred to some extent with the Neanderthals and a mysterious population in Asia called the Denisovans. Homo sapiens is now the only species of human on Earth. But that’s been true for less than 30,000 years.

Why haven’t scientists found a “missing link” between apes and us?

Because there isn’t one. Chimpanzees (or other apes) didn’t evolve into humans. Both lineages descended from a common ancestor and went their separate ways. The real question here is, who was that last common ancestor, the missing progenitor of both chimps and humans? We don’t know yet.

Is evolution over, for us or for the other apes?

Certainly not. Humans are continuing to evolve, but now the evolution is driven as much by our culture and the technology we’ve invented as by our biology. And other animals, including the apes, are also continuing to evolve—especially now, in response to the huge changes in their environment that humans have made.

Sours: https://www.nationalgeographic.com/adventure/article/human-evolution-101
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Origins: The Journey of Humankind

Origins: The Journey of Humankind
GenreHistorical non-fiction
Created byJohn D. Boswell[1]
Presented byJason Silva
Narrated byMark Monroe
Theme music composerJohn Boswell
Country of originUnited States
Original languageEnglish
No. of episodes8
Running time60 minutes
Production companyAsylum Entertainment
Original networkNational Geographic
Original release6 March (2017-03-06) –
1 May 2017 (2017-05-01)
Official Site

Origins: The Journey of Humankind is an American documentary series that premiered on the National Geographic channel on 6 March 2017.[2] Hosted by Jason Silva with narration from Mark Monroe, the series showcases through re-enactments the major inventions and events in the history of human evolution that have been responsible for our modernization.[3][4] In the eight part series, each episode is themed on one aspect of human civilization: fire, medicine, money, communication, war, shelter, exploration and transportation.[3][5] Jason Silva has mentioned the works of Marshall McLuhan to be instrumental in conceptualizing the show.[6] Andrew Byrd, an academic expert in linguistics, assisted with the ancient languages spoken during the dramatization.[7]

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Sours: https://en.wikipedia.org/wiki/Origins:_The_Journey_of_Humankind
New Human Ancestor Discovered: Homo naledi (EXCLUSIVE VIDEO) - National Geographic

Came up to me. By the light of the sun from the corridor there was dawn, about 4 o'clock in the morning. I was lying on the floor, my hands were tightly tied, and the ropes were tied around the battery, I myself was only in. Blue underwear, naturally, I did not know how my clothes were removed from me.

Geographic humans national

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Human Body 101 - National Geographic

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Well agreed, then. Sleep, tomorrow is a difficult day for you, - I said and, slapping Sevik on the ass, turned to the. Wall. In the morning I detailed my plan of action to my brother and his wife Lisa.



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