Why Paleo? | Mary Schweitzer | TEDxBozeman
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0:19 - 0:23Thank you everybody for coming,
it's wonderful to be home. -
0:23 - 0:27So, what good are dinosaurs anyway?
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0:28 - 0:31Have any of you guys
ever asked that question? -
0:31 - 0:33Why should my tax sellers go to pay
-
0:33 - 0:36to study an animal
that no human being has ever seen? -
0:36 - 0:38Aren't there
more important things to study? -
0:38 - 0:43How can dinosaurs possibly be relevant
to the massive problems we face today? -
0:43 - 0:47These are legitimate, valid questions
that I've heard often -
0:47 - 0:50in my twenty-plus-years
as a palaeontologist. -
0:50 - 0:55They've caused me to think long and hard
about how the big beast that fascinates me -
0:55 - 0:59can shed light on issues that we face
in our human dominated world. -
1:01 - 1:03So why study the distant past?
-
1:03 - 1:06Because it's an experiment
that has already been run. -
1:06 - 1:09The data are there
just waiting for us to collect them. -
1:09 - 1:13If we want to make predictions
or model the future, -
1:13 - 1:15all we have is the past.
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1:15 - 1:19And except for this tiny little bit
of period of time, -
1:19 - 1:22that humans have been
on the surface of the planet, -
1:22 - 1:25all of the data are locked
in the rock record. -
1:26 - 1:30If we want to study climate change,
all we have is the past. -
1:30 - 1:33And when we look to the past,
what we see is changed, -
1:33 - 1:36is the norm on our planet,
not the exception. -
1:36 - 1:38When we look at the values in the past,
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1:38 - 1:43they dwarf our current values
and our current concerns. -
1:43 - 1:46But is there a human overprint?
-
1:46 - 1:49We can't know that unless we study
the rocks and the past -
1:49 - 1:52before there was a time
when humans existed. -
1:52 - 1:57By comparing the two, maybe,
we can tell if that is different. -
1:58 - 2:02If we want to know
how organisms change over time, -
2:02 - 2:04all we have are their fossils.
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2:04 - 2:07How they are related to each other
and how they are related to us. -
2:07 - 2:11All records are based on the fossils.
-
2:13 - 2:18After all, almost all of the organisms
that ever lived on earth are extinct. -
2:18 - 2:22Without their fossils
we wouldn't know of their existence. -
2:22 - 2:23How did life begin?
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2:23 - 2:25How did it change?
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2:25 - 2:29How did it increase in complexity
and what were the triggers for this? -
2:29 - 2:31Only the fossils can tell us.
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2:32 - 2:34When we look at the past on our planet,
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2:34 - 2:37we see five major extinction events
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2:37 - 2:40that wiped out almost all
the life at that time. -
2:40 - 2:44When we look at the rocks,
in which the fossils are interred, -
2:44 - 2:47we see the reasons why organisms died out.
-
2:47 - 2:52They existed up to a point in time,
then they vanished globally. -
2:52 - 2:56Volcanism, plate tectonics
and extraterrestrial impacts, -
2:56 - 2:58the rocks record this.
-
2:58 - 3:03This is pretty important
because some data suggest -
3:03 - 3:06we're entering
into a sixth global extinction event. -
3:06 - 3:10But is this event truly different
from what we have seen in the past? -
3:10 - 3:15Or is it only seeming to be different
because we're here to watch, to recognize? -
3:15 - 3:17Only the rocks will tell.
-
3:18 - 3:21But why study dinosaurs in particular?
-
3:22 - 3:27By any stretch of the imagination,
dinosaurs are enormously successful. -
3:27 - 3:32More widely distributed than mammals,
they still dominate the planet. -
3:32 - 3:37There are over 10,000 species of birds
that are recognized currently, -
3:37 - 3:38and only 5,000 of mammals.
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3:38 - 3:40Longevity...
-
3:40 - 3:44Dinosaurs have ruled the world
as a dominant terrestrial organism -
3:44 - 3:47for over 200 million years.
-
3:47 - 3:51Mammals have only dominated
for the last 50 million years, -
3:51 - 3:53and humans just 200,000 years.
-
3:53 - 3:55Dinosaurs have us beaten.
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3:56 - 3:58They represent the extremes
that are possible -
3:58 - 4:01for terrestrial organisms.
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4:01 - 4:05Some of the biggest organisms to ever walk
the surface of the planet? Dinosaurs. -
4:05 - 4:08And also some of the smallest.
-
4:09 - 4:13Dinosaurs achieve things
mammals have never attained. -
4:13 - 4:17They have the best
food-processing abilities ever. -
4:17 - 4:22This dinosaur had up to 2,000 teeth
in its mouth at any one period of time. -
4:22 - 4:26Those teeth continually
replaced each other as they wore out, -
4:26 - 4:29so there was no need
for dinosaur dentists. -
4:29 - 4:31Dinosaurs embedded feathers.
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4:31 - 4:34Which bakes the question:
"Why feathers? Why not hair?" -
4:34 - 4:39Hair works really good for mammals
and feathers are metabolically expensive. -
4:39 - 4:42Dinosaurs tried out other things too.
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4:42 - 4:45We found fossils
of this little flying dinosaur, -
4:45 - 4:49that had not just two
feathered wings but four. -
4:49 - 4:51We still don't know how it flew,
-
4:51 - 4:55but we would not know
of its existence without the fossils. -
4:55 - 4:58I would argue there's another,
equally important reason, -
4:58 - 5:00to study dinosaurs and it's this:
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5:00 - 5:04we are becoming increasingly
dependant on science and technology, -
5:04 - 5:06but seeing fewer and fewer young people
-
5:06 - 5:09opt for the scientific disciplines
as a career. -
5:09 - 5:11But dinosaurs are a gateway drug.
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5:11 - 5:13(Laughter)
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5:13 - 5:17They illustrate the possibilities
and process of science. -
5:17 - 5:21You observe, you predict,
you gather data and you test. -
5:21 - 5:27What we learn from studying dinosaurs,
can be applied to other sciences as well. -
5:27 - 5:28It's pretty important.
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5:30 - 5:31It worked for me.
-
5:31 - 5:33When I was five years old,
-
5:33 - 5:35my big brother left for college
on the East Coast, -
5:35 - 5:38but not before teaching me how to read.
-
5:38 - 5:40To continue this habit
that he started in me, -
5:40 - 5:44he used to send me books
from the Biggie's coast museums. -
5:44 - 5:48My favourite book to this day
is "The Enormous Egg". -
5:48 - 5:51It tells the story
that I related to so well -
5:51 - 5:54about this little farm kid
and his favourite chicken. -
5:54 - 5:57He walked in one morning
and this little chicken was trying -
5:57 - 6:00to brood an egg
that was three times its size. -
6:00 - 6:03And when that egg finally hatched,
out popped the Triceratops. -
6:03 - 6:06Trust me, I've gathered eggs for my aunt,
-
6:06 - 6:10and I'd much rather walk into a dinosaur
than some of those chickens. -
6:11 - 6:13But what about my own speciality?
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6:13 - 6:15Why study ancient molecules?
-
6:15 - 6:20It's risky, very expensive
and there is a lot of people who say -
6:20 - 6:23we'll never get molecules
out of a dinosaur. -
6:23 - 6:24But we have.
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6:24 - 6:26Not only molecules,
-
6:26 - 6:30but we've gotten tissues and cells
for more than one fossil organism. -
6:30 - 6:33So what can those molecules tell us?
-
6:34 - 6:38With further study, they can tell us more
about evolutionary relationships, -
6:38 - 6:41so we can ever learn
from the bones themselves. -
6:41 - 6:42But more importantly,
-
6:42 - 6:46we can learn how these animals
adapted, at the molecular level, -
6:46 - 6:49to their own problems,
changes in the environment, -
6:49 - 6:52varying CO2-levels,
introduction of new diseases. -
6:52 - 6:56The dinosaurs faced all these too,
and they succeeded. -
6:56 - 6:58So we have a lot to learn from them.
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6:59 - 7:03As a matter of fact, some organisms
alive today are in danger of extinction -
7:03 - 7:06because in the past they went
through a bottle-neck event, -
7:06 - 7:11greatly reducing their genetic diversity
and the ability to adapt to change. -
7:11 - 7:15If we could find molecules
in the fossils of these organisms, -
7:15 - 7:17before they went
through this bottle-neck event, -
7:17 - 7:22we would get an idea of the original
genetic diversity in those populations, -
7:22 - 7:26and we might be able to use
this information in conservation efforts, -
7:26 - 7:29and also learn
what made them vulnerable, -
7:29 - 7:31while other organisms aren't.
-
7:33 - 7:38Looking for molecules and fossils
has already resulted in advancements -
7:38 - 7:43in comparative databases, technology
and increasing sensitivity. -
7:45 - 7:48Just the process of it
has resulted in this. -
7:48 - 7:54I can suggest that we have
a transparent flexible polymer. -
7:54 - 7:57It has to be a use for that
in biomaterial science, -
7:57 - 7:59when it lasts 80 million years.
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8:00 - 8:04Even when we study the interactions
between molecules and their environments, -
8:04 - 8:07we can learn information
about human diseases -
8:07 - 8:10which in many cases
are the result of modified molecules. -
8:10 - 8:13Even bioterrorism.
-
8:13 - 8:16What I do is look for small,
low concentration molecules -
8:16 - 8:19that are heavily modified
in a sedimentary environment. -
8:19 - 8:23And it requires really
sensitive instrumentation to do so. -
8:23 - 8:27That's what we need
when we look for bioterrorist agents. -
8:27 - 8:30They're highly modified,
low in concentration, -
8:30 - 8:32and they cause a lot of problems.
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8:32 - 8:34The same skill set is required.
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8:34 - 8:38So I can make all roads lead to dinosaurs.
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8:38 - 8:41For me it all began
with a children's book. -
8:41 - 8:44This professor is talking
to the little boy -
8:44 - 8:46when he comes to study that Triceratops
-
8:46 - 8:50and he says: "a scientist doesn't know
all the answers, nobody does. -
8:50 - 8:52Not even teachers."
-
8:52 - 8:55- They used to think highly
of teachers back then. - -
8:55 - 8:58But a scientist keeps on trying
to find the answers. -
8:58 - 9:01And just remember
when you're talking about frontiers: -
9:01 - 9:04maybe the next frontier lies in the past.
-
9:04 - 9:06Thank you.
-
9:06 - 9:07(Applause)
- Title:
- Why Paleo? | Mary Schweitzer | TEDxBozeman
- Description:
-
Looking at dinosaurs in the past, besides being an awesome job, can help us solve current concerns, such as climate change or recognize the next global extinction event yet to come.
- Video Language:
- English
- Team:
- closed TED
- Project:
- TEDxTalks
- Duration:
- 09:11
Tulio Leao approved English subtitles for Why Paleo? | Mary Schweitzer | TEDxBozeman | ||
Tulio Leao edited English subtitles for Why Paleo? | Mary Schweitzer | TEDxBozeman | ||
Tulio Leao edited English subtitles for Why Paleo? | Mary Schweitzer | TEDxBozeman | ||
Tulio Leao edited English subtitles for Why Paleo? | Mary Schweitzer | TEDxBozeman | ||
Denise RQ accepted English subtitles for Why Paleo? | Mary Schweitzer | TEDxBozeman | ||
Denise RQ edited English subtitles for Why Paleo? | Mary Schweitzer | TEDxBozeman | ||
Denise RQ edited English subtitles for Why Paleo? | Mary Schweitzer | TEDxBozeman | ||
Denise RQ edited English subtitles for Why Paleo? | Mary Schweitzer | TEDxBozeman |
Son Huy Vu
3:21.03 'stretch of imagination' is correct.
3:53.27 corrected 'Dinosaurs have us beaten'
4:25.76 '...no need for dinosaur "dentist (?)"'
5:34.99 corrected: 'But not before he teaches me how to read'
6:37.96 '...learn from the "bones (?)" themselves'
6:48.89 corrected: '...introduction of new diseases.'
7:29.02 inserted '...while other organisms aren't.'
Tulio Leao
Hello,
I've reworked the title to comply with new standards and removed the description of TEDx, all of which are stated here: http://translations.ted.org/wiki/How_to_Tackle_a_Transcript#Title_format
Can you write a short description for the talk, as it currently doesn't have one?
I've noticed many of the subtitles don't respect the 42 characters per line or 21 characters per second rule, could you please adjust them, so that they do? The rule is explained here: https://www.youtube.com/watch?v=yvNQoD32Qqo
There is a good tool to check if they are respecting the 42:21 rule here: http://archifabrika.hu/tools/
Thank you!