A crocodile has made herself pregnant in what is believed by scientists to be a world first. The crocodile at the Costa Rica zoo created a foetus that was 99.9 per cent genetically identical to itself, often known as a "virgin birth." This process typically does not occur with crocodiles but with other species such as birds, lizards, snakes, fish and sharks. Sign up to our free Indy100 weekly newsletter Scientists believe this kind of solo reproduction could be traced back to the dinosaurs, as they suggest the species may have also been capable of this rare method. The latest study was published on Wednesday (June 7) in the Royal Society journal, Biology Letters. Back in January 2018, an egg was laid by an 18-year-old female American crocodile in Parque Reptilania, the BBC reported. The fully formed foetus did not hatch however and was stillborn. Researchers from Virginia Polytechnic Institute and State University, say this is the "first documentation" of this kind of reproduction in this species. Dr Warren Booth who has studied virgin births (parthenogenesis) for 11 years theorised that this reproduction method has not been seen in crocodiles because weren't looking out for this happening. ''There was a big increase in reports of parthenogenesis when people started keeping pet snakes. But your average reptile keeper doesn't keep a crocodile," he noted to the BBC. "This new evidence offers tantalizing insights into the possible reproductive capabilities of extinct archosaurian relatives of crocodilians, notably the Pterosauria and Dinosauria," experts said in the study. 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.

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A dead “vampire” star is feeding on a nearby companion and expelling cannonballs and its behaviour has left astronomers stunned. The dead star is located around 4,500 light-years away and, until now, has baffled astronomers with its unusual behaviour. It is a rapidly spinning neutron star, otherwise known as a pulsar, that has been given the name PSR J1023+0038, shortened to J1023. It emits radiation from both its poles that occasionally reach Earth and also appears to have two different “settings” of brightness. Initially, the behaviour of J1023 confused experts, but now they believe that the stark difference in brightness levels has to do with the star launching out matter over short spaces of time. Maria Cristina Baglio, leader of the research team and scientist at New York University, Abu Dhabi, said in a statement: “We have witnessed extraordinary cosmic events where enormous amounts of matter, similar to cosmic cannonballs, are launched into space within a very brief time span of tens of seconds from a small, dense celestial object rotating at incredibly high speeds.” In addition to the pulsar emitting matter, over the last 10 years, scientists have witnessed the star pulling material from its companion star. The material it is stealing forms a structure called an accretion disk that forms around the star itself. Since it began feeding, the star has been alternating between between “low” and “high” power modes. During moments of high power, the star shines brightly with a variation of X-rays, ultraviolet and visible light. During low power, it emits radio waves and appears much dimmer. In June 2021, experts witnessed a star shooting out hot, luminous matter that has been compared to a cosmic cannonball as the star continually switched modes. J1023 has fascinated experts, who have been able to explain the way the star behaves by observing it. Despite solving many of its mysteries, the scientists aren’t done with it yet. With the Extremely Large Telescope (ELT) in northern Chile currently under construction, it is hoped that when it is ready, scientists will once more be able to observe the pulsar. Sergio Campana, research co-author and Research Director at the Italian National Institute for Astrophysics Brera Observatory, said: “The ELT will allow us to gain key insights into how the abundance, distribution, dynamics and energetics of the inflowing matter around the pulsar are affected by the mode switching behavior.” 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.

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