Independent] Mysterious extraterrestrial rocks are unlike anything ever found on Earth, according to scientists.
The Hypatia stone – pebbles found in Egypt, which once came from a
huge rock that was several metres wide – have long been known to have
come to Earth from somewhere else. But new research shows they are even
more alien than we thought, having been formed outside of our solar
system and even before our sun existed.
That's the conclusion of new research that looked at how the strange
rocks were formed, by exploring what minerals can be found inside them.
In 2013, the rocks were found not to have come from Earth, and two
years later scientists confirmed that they had not come down to Earth as
part of any known meteor or comet. The new work aimed to look at the
minerals found inside and find how they were made up.
"When Hypatia was first found to be extraterrestrial, it was a
sensation, but these latest results are opening up even bigger questions
about its origins," said Dr Marco Andreoli, a research fellow at the
School of Geosciences at the University of the Witwatersrand, and a
researcher on the study.
Jan Kramers, the professor who undertook the new study, said that the
internal structure of the rock was something like a fruitcake that had
fallen and broken across. By looking at the various bits of fruits that
are found inside, they can try and understand how the rock was formed
and where ti came from.
"We can think of the badly mixed dough of a fruit cake representing the
bulk of the Hypatia pebble, what we called two mixed 'matrices' in
geology terms," said Professor Kramers. "The glace cherries and nuts in
the cake represent the mineral grains found in Hypatia 'inclusions'. And
the flour dusting the cracks of the fallen cake represent the
'secondary materials' we found in the fractures in Hypatia, which are
from Earth," he says.
The mixture of that dough looks like nothing ever before seen on
Earth. Usually, scientists would expect to see a little bit of carbon
and lots of silicon – but the rock is made up the complete opposite way
Not only is that mix unlike anything ever seen on Earth, the
individual materials that make it up appear to have been formed in the
pre-solar time. That means it was formed before our own sun or solar
system, opening up further questions about where it came from. Read More