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Dinosaurs’ extinction gave rise to modern fish: Study

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New York: Paleontologists have determined that ray-finned fish – the world’s most diverse vertebrates – began their dominance in the oceans 66 million years ago after the mass extinction that wiped out dinosaurs from the Earth.

“The extinction marked an ecological turning point for the pelagic marine vertebrates,” said professor Richard Norris and graduate student Elizabeth Sibert from Scripps Institution of Oceanography at University of California, San Diego.

They analysed the microscopic teeth of fish found in sediment cores and found that the abundance of ray-finned fish teeth began to explode in the aftermath of the extinction of the dinosaurs.

Ninety-nine percent of all fish species in the world – from goldfish to tuna and salmon – are classified as ray-finned fish.

They are defined as species with bony skeletal structures and have teeth that are well preserved in deep ocean mud.

Now there are 30,000 ray-finned fish species in the oceans, the most numerically diverse and ecologically dominant species among all vertebrates on land or in the ocean.

Sibert and Norris said, “It is amazing how quickly fish double, then triple in relative abundance to sharks after the extinction, suggesting that fish were released from predation or competition by the extinction of other groups of marine life.”

“Before the extinction of dinosaurs, ray-finned fishes existed in a state of relative ecological insignificance just like mammals on land,” Sibert said.

“Mammals evolved 250 million years ago but did not become really important until after the mass extinction. Ray-finned fishes have the same kind of story.”

The paper titled ‘New Age of Fishes initiated by the Cretaceous-Paleogene mass extinction’ appeared in the journal Proceedings of the National Academy of Sciences.

Business

Apple is giving a huge discount on its gadgets: Details inside

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If you want to buy an iPhone and were waiting for a nice offer, then we have a piece of good news for you! Amazon Summer Sale May 2022 has begun and they are offering major discounts on various smartphones, laptops, and smart TVs, among others.

The sale is live now on the e-commerce platform with no-cost EMI options and exchange discounts on various products. In addition to this, Amazon has also partnered with several banks including ICICI, Kotak Bank, and RBL so that customers get instant discounts of up to 10% using their cards and EMI transactions.

Customers can easily enjoy this summer sale and get massive discounts on iPhones. They can also compare prices on Flipkart Big Saving Days Sale 2022 before making a purchase.

 

Amazon Summer Sale May 2022: Discount offer on iPhone 13 

Apple’s coveted phone model iPhone 13 in the 128 GB storage model will be available during the Amazon Summer Sale May 2022 for Rs 64,900. The MRP of the phone is Rs 79,900. This means that the customers will be able to enjoy a discount of up to Rs 15,000 on the purchase of the iPhone 13.

If you have an old iPhone in working condition then you will also be eligible to receive another additional discount worth up to Rs 17,000 on the iPhone 13.

Buy at Rs. 64,900 (MRP – Rs. 79,900)

Features of Apple iPhone 13 

The iPhone is powered by an A15 Bionic processor with 6 core CPU. Apart from this, it has 16 core neural engines. With the iPhone 13, up to 512 GB of storage will be available. The iPhone 13 has a 6.1-inch Retina XDR display with 1000 nits brightness.

The iPhone 13 has a 12-megapixel dual rear camera setup. This time a new wide-angle camera has been given, whose aperture is f/1.6. With this, there is support for sensor optical stabilisation. Night mode has been made better than before. The second lens is also 12 megapixels ultra-wide and has an aperture of f/2.4.

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