The annual migration of red crabs has brought traffic to a standstill on an Australian island. Apart from the epic journey, the species is also notorious for eating its own young.

Tens of millions of crustaceans are swarming Canberra-governed Christmas Island, which is almost a thousand miles northwest of the Australian mainland. Parks Australia, a government body in charge of wildlife conservation on the island, has deployed its staff to manage traffic, rake crabs off roads and provide advisories to local residents regarding road closures. Authorities are well-prepared to deal with the epic crab march as it repeats every year, usually in October and November. There are even special bridges and tunnels in place, built over and under busy roads so as to minimize the number of crabs crushed by cars. The sight of millions of these creatures making their perilous trek has become one of Christmas Island’s main tourist attractions.

Millions of crabs have flooded the roads on Australia’s Christmas Island pic.twitter.com/Qa2CbSzwMW

— RT (@RT_com) November 18, 2021

The exact timing of the red crabs’ journey from forest to ocean is defined by rainfall and lunar phases. The march is led by male crabs, which are later joined by females. On reaching the ocean, they mate and spawn, with each female capable of producing as many as 100,000 eggs. However, most of the young crabs never make it back to the forest as they end up being eaten by fish and whale sharks for whom this is a veritable feast. To make matters worse, the crab larvae that do make it to the beach are often devoured by returning adult crabs of the very same species, hence one of their names – the cannibal crab.

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Objects, including spacecraft, could pierce through the universe using several black holes as a ‘shortcut’, a new study suggests.

The new theory posited by French physicist Pascal Koiran marks a break from earlier research in the field of black hole studies. Previously, it was thought that a so-called ‘wormhole’ composed of two black holes would be prone to instantly collapse, thus making it impossible for an object to successfully travel all the way from one side and out the other. However, by employing different metrics, the French scientist’s new model has arrived at a very different conclusion: “We show that the particle reaches the wormhole throat for a finite value t′1 of the time marker t′.” In essence, that means an object, for instance, a spacecraft, could pass through this wormhole portal intact and reach some far-away region of the universe, taking far less time than would be needed if traveling conventionally.

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The study in its entirety will see the light of day in the upcoming issue of the Journal of Modern Physics D, though an abstract has been available since early October.

Yet, there are too many ifs as to whether this purely theoretical model has any bearing on the way the universe actually works. For starters, to create such a time-and-space tunnel you would need a regular black hole and a so-called white hole, which is essentially a black hole in reverse. While black holes never let anything out, their ‘twins’ never let anything in. So, according to Albert Einstein’s theory of general relativity and Nathan Rosen’s additions to it, if you were to connect the two, they would make up a bridge across time and space. However, if the laws postulated by another branch of physics, thermodynamics, are anything to go by, such a construct would be highly unstable. Perhaps more importantly, the very existence of white holes has yet to be proven beyond a reasonable doubt. At present, they remain a pure theorization, thus putting any talk of space-and-time portals on rather shaky ground.

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