Saturday December 14, 2019

Frogs’ Survival Possible due to Dinosaurs’ Death: Study

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Frogs' survival
There are 6,700 known species of Frogs today. Wikimedia
  • Many theories exist explaining the extinction of Dinosaurs but the most agreed upon is the asteroid explanation
  • It turns out that the frogs’ survival is due to the extinction of dinosaurs just like their extinction paved way for successful human evolution
  • If the asteroid catastrophe would not have happened, 88% of today’s frog’s species would not be here today

July 04, 2017: A study carried out by American and Chinese biologists has concluded that had it not been for the extinction of dinosaurs by the asteroid, 88% of frog’s species we have today would not exist. The frogs’ survival was a benefit reaped out of the death of dinosaurs.

The Asteroid that hit the planet wiped out three-quarters on animals on the Earth. The extinction is popularly known as the Cretaceous-Paleogene (K-PG) boundary.

The asteroid which met the Earth 66 million years ago had a direct impact in wiping out dinosaurs from the face of the planet, however, the frogs actually benefitted out of it. The emergence of frogs can be traced back to 200 million years.

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The resilient creatures were able to take advantage of an evolutionary vacuum that was created as a result of the destruction. It has been observed that 9 out of 10 frog species that exist today evolved from just three frog lineages that survived the asteroid impact, mentioned ANI report.

Frogs are “master survivors” stated David Wake, co-author of the research paper published in Proceedings of the National Academy of Science. They were quick to take to trees which at the time were “evolving to their full flowering”. The team of Gene researchers studied 95 sets of genes from 156 frog species.

Today, frogs are the most diverse group of vertebrates with more than 6,700 species discovered.

– prepared by Saksham Narula of NewsGram. Twitter: @Saksham2394

Next Story

Archeologists find New Evidence about Extinction of Ice Age Animals

The study builds on similar findings of platinum spikes -- an element associated with cosmic objects like asteroids or comets

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Extinction
Team of researchers found unusually high concentrations of platinum and iridium in outwash sediments from a recently discovered crater in Greenland that could have been the impact point of Extinction. Pixabay

Archaeologists have found new evidence that an extraterrestrial body crashed to Earth almost 13,000 years ago that caused the Extinction of many large animals and a probable population decline in early humans.

The Younger Dryas Impact Hypothesis, controversial from the time it was presented in 2007, proposes that an asteroid or comet hit the Earth about 12,800 years ago causing a period of extreme cooling that contributed to extinctions of more than 35 species of megafauna including giant sloths, sabre-tooth cats, mastodons and mammoths.

It also coincides with a serious decline in early human populations such as the Clovis culture and is believed to have caused massive wildfires that could have blocked sunlight, causing an “impact winter” near the end of the Pleistocene Epoch.

In a new study published in the journal Scientific Reports, University of South Carolina archaeologist Christopher Moore and 16 colleagues present further evidence of a cosmic impact based on research done at White Pond near Elgin, South Carolina.

The study builds on similar findings of platinum spikes — an element associated with cosmic objects like asteroids or comets — in North America, Europe, western Asia and recently in Chile and South Africa.

“There have been numerous papers that have come out in the past couple of years with similar data from other sites that almost universally support the notion that there was an extraterrestrial impact or comet airburst that caused the Younger Dryas climate event,” said Moore.

“First, we thought it was a North American event, and then there was evidence in Europe and elsewhere that it was a Northern Hemisphere event. And now with the research in Chile and South Africa, it looks like it was probably a global event,” he added.

Extinction
Archaeologists have found new evidence that an extraterrestrial body crashed to Earth almost 13,000 years ago that caused the Extinction of many large animals and a probable population decline in early humans. Pixabay

In addition, a team of researchers found unusually high concentrations of platinum and iridium in outwash sediments from a recently discovered crater in Greenland that could have been the impact point.

Although the crater hasn’t been precisely dated yet, Moore said the possibility is good that it could be the “smoking gun” that scientists have been looking for to confirm a cosmic event.

Additionally, data from South America and elsewhere suggests the event may have actually included multiple impacts and airbursts over the entire globe.

While the brief return to ice-age conditions during the Younger Dryas period has been well-documented, the reasons for it and the decline of human populations and animals have remained unclear. The impact hypothesis was proposed as a possible trigger for these abrupt climate changes that lasted about 1,400 years.

Extinction
Failure of glacial ice dams allowed a massive release of freshwater into the north Atlantic, affecting oceanic circulation and causing the Earth to plunge into a cold climate before Extinction. Pixabay

The conventional view has been that the failure of glacial ice dams allowed a massive release of freshwater into the north Atlantic, affecting oceanic circulation and causing the Earth to plunge into a cold climate.

The Younger Dryas hypothesis simply claims that the cosmic impact was the trigger for the meltwater pulse into the oceans.

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“We speculate that the impact contributed to the extinction, but it wasn’t the only cause. Over hunting by humans almost certainly contributed, too, as did climate change,” Moore noted. (IANS)