Mass Extinction: Life At The Brink DVD

$24.99
Item #: WB7062
It's a mystery on a global scale: five times in Earth's past, life has been nearly extinguished, the vast majority of plants and animals annihilated in a geologic instant. What triggered these dramatic events? And what might they tell us about the fate of our world? MASS EXTINCTION: LIFE AT THE BRINK joins scientists around the globe as they unravel ... More
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It's a mystery on a global scale: five times in Earth's past, life has been nearly extinguished, the vast majority of plants and animals annihilated in a geologic instant. What triggered these dramatic events? And what might they tell us about the fate of our world? MASS EXTINCTION: LIFE AT THE BRINK joins scientists around the globe as they unravel the mysteries of two of the most dramatic mass extinction.

Mass Extinction: Life at the Brink joins scientists around the globe as they unravel the mysteries of two of the most dramatic mass extinctions - the "K/T Extinction" that wiped out the dinosaurs, and "The Great Dying," which obliterated nearly 90% of all Earth's species. At first glance, these two extinctions couldn't look more different. A six-mile-wide asteroid spelled near-instant doom for the dinosaurs. And as new research covered in the film reveals, massive volcanic eruptions altered the chemistry of the atmosphere and ocean to trigger "The Great Dying." As different as they seem, these two extinctions share uncanny similarities and a message for today. Could the impact of human beings be just as devastating to the planet as a massive asteroid strike or volcanic eruptions?

Producer: HHMI/ Tangled Bank Studios
Production Year: 2015
Copyright Year: 2015
Narrator: Jeffrey Wright
Writers: Sarah Holt
Number of Discs: 1
Length: 60 minutes
Subtitled: Y
Subtitle Languages: English (SDH)
Audio Format: 5.1 Surround
Aspect Ratio: 16x9 Widescreen

6 Reviews
N
Nate
Anonymous User
5.0 star rating
07/17/20
Excellent investigation into K-T extinction, P-T extinction
Review by Nate on 07/17/20 review stating Excellent investigation into K-T extinction, P-T extinction
Highly interesting documentary at the seam of geology and biology. If youre a teacher, go to HHMI for a free copy. Definitely worth the hour!
S
Sr S.
Anonymous User
5.0 star rating
07/17/20
The miracle of Universal Life
Review by Sr S. on 07/17/20 review stating The miracle of Universal Life
This DVD made it quite clear that life is really fleeting. Where we are now has taken billions of years to form and modern humans only hundreds of thousands of years. Each decade of our life is not even measurable in the universal story. But out fleeting existence as it is can vanish in a millisecond, due to our short activity on the Earth. This dvd puts everything in perspective.
T
Teacher
Anonymous User
5.0 star rating
07/17/20
Great educational tool
Review by Teacher on 07/17/20 review stating Great educational tool
I have used this as a supplement to the HHMI Biointeractive lectures on Mass Extinctions for my AP Biology course. It is useful for teaching not only about the mass extinctions, but also population dynamics for environmental science courses. It is entertaining enough that students think it is a movie and educational enough to add into a teaching toolbox.
R
Rene
Anonymous User
5.0 star rating
07/17/20
Mass Extinction
Review by Rene on 07/17/20 review stating Mass Extinction
This is a fascinating presentation that focusses on two of the five planet-wide extinctions and also on their relevance to us and our civilization today. It first goes over the most recent, the asteroid impact that killed off the dinosaurs and much of other life about 65 million years ago. Next it discusses the greatest extinction, the Permian extinction about 251 million years ago, caused by vast eruptions in Siberia. Finally, the program details the current status of the present day world and how danger signs are appearing, much of which may be caused by human use and abuse of the planet through burning fossil fuels and releasing various substances into the ecosystem.
C
Consumer
Anonymous User
1.0 star rating
07/17/20
Disappointing
Review by Consumer on 07/17/20 review stating Disappointing
This starts out telling you there have been six mass extinctions and then proceeds to examine two of them (Permian Great Dying and Cretaceous/Tertiary), but doesnt bother to even name the others or give any idea of the timing of them. The examination of the two chosen is pretty superficial. Thats because there is a third part to the story the makers want to convey: That the next Mass Extinction is now and its because of human additions of CO2 to the atmosphere which is causing Climate Change. This is dealt with superficially also: the ravaging of the tree lines due to beetle infestation is one of the major proofs offered. No discussion of any contrary opinion (for example: that CO2 may not have much at all to do with temperature increase and humans cant possibly add enough gases to cause warming). Oh, and 95% of scientists agree etc. Of course they never discuss that the 95% figure is based upon a study of manuscripts offered for publication, of which, one third of the scientists who accepted climate change had 95% agreement that it was happening! Thats 95% of 33 1/3%. Im just a layman, but I remember the Time Magazine Cover story in the 1970s of the coming Little Ice Age because of the trend of COOLING temperatures for the prior three decades. What happened with that? Where is that data? And, it now appears that the temperature data is interpreted before being entered, so were not getting the raw data after all. To use science for political gain is unforgiveable. To use science for political correctness gain is beyond disturbing. However, PBS does receive government money and the popular idea now is man-made global warming, the research of which starts with the conclusion that it is occurring and no funding if the project isnt in conformity. To disguise a political propaganda piece as scientific is just beneath even a government funded entity ... isnt it?


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