No one has yet managed to travel through time – at least to our knowledge – but the question of whether or not such a feat would be theoretically possible continues to fascinate scientists.
As movies such as The Terminator, Donnie Darko, Back to the Future and many others show, moving around in time creates a lot of problems for the fundamental rules of the Universe: if you go back in time and stop your parents from meeting, for instance, how can you possibly exist in order to go back in time in the first place?
It's a monumental head-scratcher known as the 'grandfather paradox', but a few years ago physics student Germain Tobar, from the University of Queensland in Australia, worked out how to "square the numbers" to make time travel viable without the paradoxes.
"Classical dynamics says if you know the state of a system at a particular time, this can tell us the entire history of the system," Tobar explained back in 2020. READ MORE...
Wild Pigs Release as Much CO2 as More Than 1 Million CarsThey are like tractors plowing through fields.:max_bytes(150000):strip_icc():format(webp)/wild-pig-field-cc2778a00b34423b9851b7bbad05691f.jpg)
Feral pigs have the same climate impact as 1.1 million cars, according to recent research.
Using modeling and mapping techniques, an international team of scientists predict that wild pigs are releasing 4.9 million metric tonnes of carbon dioxide each year around the world when they uproot soil.1
One of the study’s authors, Christopher O'Bryan, is a postdoctoral research fellow of the University of Queensland. He tells Treehugger that feral pigs are prolific globally.
“Wild pigs (Sus scrofa) are found on every continent except Antarctica but are native throughout most of Europe, Asia, and parts of northern Africa,” he says. “As such, they have been spread around the world by humans and are invasive species in Oceania, parts of Southeast Asia, parts of southern Africa, and North and South America.”
For the study, which was published in the journal Global Change Biology, researchers only looked at areas where wild pigs are invasive and not native. READ MORE
