Hammerhead sharks are named that for a fairly obvious reason, but now groundbreaking footage has emerged which shows exactly how their unique head shape occurs. The strange-looking hammerhead shark has a very broad nose and spaced-out eyes that lend to its name and make it one of the most bizarre-looking sharks out there. Scientists studying the creature have until now had no idea how their hammers form, but now researchers have gotten a glimpse thanks to new footage. The species’ embryonic development is notoriously hard to study as they don’t lay eggs, so experts instead have been helped by the bonnethead sharks (Sphyrna tiburo), the smallest hammerhead species which is commonly found in estuaries and waters in the Gulf of Mexico and the Western North Atlantic Ocean. In a study published in Developmental Dynamics, researchers looked at embryos that had been preserved from bonnetheads that had been caught in previous studies to ensure that no additional sharks were affected. They studied embryos of the sharks at different stages of their development and witnessed as the shark's head started to form its unique shape. Hammerhead Transformation www.youtube.com The team found that the bonnetheads develop their head early on in their development, but the hammer doesn’t begin to form until around halfway through their gestation when the cartilage that forms the hammer begins to expand from the nasal area. The lead author, Steven Byrum, explained: “It’s the perfect qualities of the bonnethead that allowed us [to] do it with this species. “This was a unique opportunity we may not be able to get for very much longer with bonnetheads and may not be able to get in any other species of hammerhead.”

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Meta has announced plans to remove all news content from Facebook and Instagram in Canada ahead of a new law coming into effect that would force the platforms to share revenue with publishers. The Online News Act, known as Bill C-18, will force big technology companies to compensate news publishers for content that appears on their platforms, with Google also impacted by the legislation. “Today, we are confirming that news availability will be ended on Facebook and Instagram for all users in Canada prior to the Online News Act (Bill C-18) taking effect,” Facebook said in a blog post. “We have repeatedly shared that in order to comply with Bill C-18, passed today in Parliament, content from news outlets, including news publishers and broadcasters, will no longer be available to people accessing our platforms in Canada.” Ottawa has said the law creates a level playing field between online advertising giants and the shrinking news industry. Canadian Heritage Minister Pablo Rodriguez has promised to push back on what he describes as “threats” from Facebook and Google to remove journalism from their platforms. Meta’s plan to comply with the new law by blocking all news will also likely be harmful for news organisations, who derive web traffic from stories posted to Facebook and Instagram. The tech giant did not offer details about the timeline for the move, with the bill set to come into force six months after it receives royal assent. Meta, which is based in Menlo Park, California, has taken similar steps in the past. In 2021, it briefly blocked news from its platform in Australia after the country passed legislation that would compel tech companies to pay publishers for using their news stories. It later struck deals with Australian publishers. Laura Scaffidi, a spokesperson for the minister, said Mr Rodriguez was set to have a meeting Thursday afternoon with Google, which has hinted that removing news links from its popular search engine is a possibility. The company didn’t provide comment on the matter. Meta is already undergoing a test that blocks news for up to five percent of its Canadian users, and Google ran a similar test earlier this year. The Online News Act requires both companies to enter into agreements with news publishers to pay them for news content that appears on their sites if it helps the tech giants generate money. Ms Scaffidi said: “The tech giants do not have obligations under the act immediately after Bill C-18 passes. As part of this process, all details will be made public before any tech giant is designated under the act.” Additional reporting from agencies Read More Elon Musk confirms cage fight with Mark Zuckerberg Facebook Marketplace is most complained-about online retail platforms Meta reveals new AI that is too powerful to release Mark Zuckerberg reveals what he thinks about Apple’s headset – and it’s not good

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