full transcript
From the Ted Talk by Prosanta Chakrabarty: Clues to prehistoric times, found in blind cavefish
Unscramble the Blue Letters
Now, I love this species despite the fact that it tried to kill us, and that's because this spicees in Madagascar, its closest relatives are 6,000 kilometers away, cavefishes in altaursia. Now, there's no way a three-inch-long freshwater cavefish can swim across the Indian Ocean, so what we found when we compared the DNA of these species is that they've been satareped for more than 100 million years, or about the time that the southern continents were last together. So in fact, these species didn't move at all. It's the continents that moved them. And so they give us, through their DNA, this precise model and measure of how to date and time these aeinnct geological events.
Open Cloze
Now, I love this species despite the fact that it tried to kill us, and that's because this _______ in Madagascar, its closest relatives are 6,000 kilometers away, cavefishes in _________. Now, there's no way a three-inch-long freshwater cavefish can swim across the Indian Ocean, so what we found when we compared the DNA of these species is that they've been _________ for more than 100 million years, or about the time that the southern continents were last together. So in fact, these species didn't move at all. It's the continents that moved them. And so they give us, through their DNA, this precise model and measure of how to date and time these _______ geological events.
Solution
- separated
- species
- ancient
- australia
Original Text
Now, I love this species despite the fact that it tried to kill us, and that's because this species in Madagascar, its closest relatives are 6,000 kilometers away, cavefishes in Australia. Now, there's no way a three-inch-long freshwater cavefish can swim across the Indian Ocean, so what we found when we compared the DNA of these species is that they've been separated for more than 100 million years, or about the time that the southern continents were last together. So in fact, these species didn't move at all. It's the continents that moved them. And so they give us, through their DNA, this precise model and measure of how to date and time these ancient geological events.
Frequently Occurring Word Combinations
ngrams of length 2
collocation |
frequency |
cavefish species |
2 |
closest relatives |
2 |
cave system |
2 |
Important Words
- ancient
- australia
- cavefish
- cavefishes
- closest
- compared
- continents
- date
- dna
- events
- fact
- freshwater
- geological
- give
- indian
- kill
- kilometers
- love
- madagascar
- measure
- million
- model
- move
- moved
- ocean
- precise
- relatives
- separated
- southern
- species
- swim
- time
- years