Divers in Mexico have discovered Megalodon teeth in a flooded inland cave and the findings have confirmed scientific beliefs. Megalodons were absolutely gigantic prehistoric sharks that reached sizes of up to 50 feet long. They dominated the oceans before going extinct around 3.6 million years ago. Scientists are interested in studying fossils of the huge sea creature, with the animal's teeth proving the most abundant type of fossil to be found today. Teeth fossils were found in Mexico by speleologist (cave specialist) and photographer Kay Nicte Vilchis Zapata and fellow speleologist Erick Sosa Rodriguez while diving in a newly discovered sinkhole in Cholul in 2019. The cenote is 400 meters long and 28 meters deep and located inside were fifteen teeth fossils from various shark species. They also discovered human remains and a vertebrae fossil that potentially belongs to an ancient species. A total of 13 of the 15 teeth fossils belonged to three different species of shark – one being the megalodon (Carcharocles megalodon), while the other two species were the mackerel shark (Isurus oxyrinchus) and the sawshark (Pristiophoridae). Zapata told local media at the time: “We were looking at the wall and suddenly I saw a little something, I went closer and I saw that it was a tooth, that was the first and apparently it belonged to a sawshark.” Experts believe the geological timescale of the megalodon teeth lies anywhere between 2.5 million to 5 million years old. Speleologist Sosa Rodriguez said: “It is just proof of what scientists have already studied and written about; what kind of wildlife lived here millions of years ago when this was part of the sea.” Scientists have suggested that the megalodon’s warm body temperature may have been the reason for its extinction. There is some thought that the megalodon was able to maintain a body temperature around 7 degrees centigrade warmer than the water around it, but ultimately this may have been its downfall. Randy Flores, a UCLA doctoral student and fellow of the Centre for Diverse Leadership in Science, explained: “Maintaining an energy level that would allow for megalodon’s elevated body temperature would require a voracious appetite that may not have been sustainable in a time of changing marine ecosystem balances when it may have even had to compete against newcomers such as the great white shark.” Sign up to our free Indy100 weekly newsletter Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

Apple has blamed Instagram and other popular apps for an overheating issue with the iPhone 15. The US tech giant said a software bug tied to the Meta-owned app was among the reasons for users reporting that its latest range of smartphones, unveiled last month, become “too hot to touch” while performing certain tasks. The company is working on an update to its latest iOS 17 operating system, which serves as the software for the iPhone 15, iPhone 15 Plus, iPhone 15 Pro and iPhone 15 Pro Max. Meta has acknowledged the issue, which some users have dubbed “heatgate”, and modified its Instagram app in an effort to prevent it from heating up the device. Other apps blamed for the problem, including Uber and the video game Asphalt 9, are yet to roll out updates, according to Apple. There is also no timeline for when Apple’s own software fix would be issued but the firm said no safety issues should prevent iPhone 15 owners from using their devices while awaiting the update. “We have identified a few conditions which can cause iPhones to run warmer than expected,” Apple said in a short statement. It’s not unusual for new iPhones to get uncomfortably warm during the first few days of use or when they are being restored with backup information stored in the cloud – issues that Apple already flags for users. The devices also can get hot when using apps such as video games and augmented reality technology that require a lot of processing power, but the heating issues with the iPhone 15 models have gone beyond those typical situations. In its acknowledgement, Apple stressed that the trouble isn’t related to the new titanium casing that houses the high-end iPhone 15 Pro and iPhone 15 Pro Max instead of the stainless steel used on older smartphones. Apple also dismissed speculation that the overheating problem in the new models might be tied to a shift from its proprietary Lightning charging cable to the more widely used USB-C port that allowed it to comply with a mandate issued by European regulators. Although Apple expressed confidence that the overheating issue can be quickly fixed with the upcoming software updates, the problem still could dampen sales of its marquee product at a time when the company has faced three consecutive quarters of year-over-year declines in overall sales. The downturn has affected iPhone sales, which fell by a combined 4 per cent in the nine months covered by Apple’s past three fiscal quarters compared with a year earlier. Apple is trying to boost its sales in part by raising the starting price for its top-of-the-line iPhone 15 Pro Max to $1,200, an increase of $100, or 9 per cent, from last year’s flagship model. In its acknowledgement of the iPhone 15 overheating issue, Apple said the planned software update would not impact the phone’s performance, which analysts had warned is a possibility. Additional reporting from agencies Read More Tim Cook interview: Apple boss talks trillion-dollar transformation and ushering in new era of computing

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