No paradox for time travellers

New Scientist Breaking News – No paradox for time travellers

Some solutions to the equations of Einstein’s general theory of relativity lead to situations in which space-time curves back on itself, theoretically allowing travellers to loop back in time and meet younger versions of themselves. Because such time travel sets up paradoxes, many researchers suspect that some physical constraints must make time travel impossible. Now, physicists Daniel Greenberger of the City University of New York and Karl Svozil of the Vienna University of Technology in Austria have shown that the most basic features of quantum theory may ensure that time travellers could never alter the past, even if they are able to go back in time.

I don’t know much of anything about quantum physics, but I always just kind of liked to think that if you could go back in time, obviously you wouldn’t be able to change anything. If you went back in time and killed your parents, you would never be born, so duh… you can’t do it! Now there is some model of quantum mechanics that might explain this, but I’m not going to pretend to understand it.

I just love thinking about parasites…

Ah, sarcasm… The title of this article is hilarious.

Dangerrrr: cats could alter your personality – Times Online

He found the women infected with toxoplasma spent more money on clothes and were consistently rated as more attractive. "We found they were more easy-going, more warm-hearted, had more friends and cared more about how they looked," he said. "However, they were also less trustworthy and had more relationships with men."

Apparently I do not carry this particular parastite.

As opposed to civilization, which is far superior.

Aljazeera.Net – Europe’s oldest civilisation is found

More than 150 large temples, constructed between 4800 BCE and 4600 BCE, have been unearthed in fields and cities in Germany, Austria and Slovakia, predating the pyramids in Egypt by about 2000 years, the newspaper revealed on Friday.

But where are the pictures? And how do they know that they are temples. More information, plz!

[Edit]Here is The Independent’s version of the story, with more details, but still no pictures.[/Edit]