Spanish Stonehenge Emerges out of Water

Last week we told you about the flurry of recent coverage resurfacing 2018 news stories about the re-emergence of so-called "hunger stones" due to extreme drought conditions in Europe. 

We also noted that Europe is once again in the midst of a historically severe drought. Now an ancient site known as the "Spanish Stonehenge"—submerged underwater by a reservoir for decades—has been fully exposed for the second time since 2019 due to low water levels in the reservoir.

The site is also known as the Dolmen of Guadalperal, a circular grouping of 150 large vertical granite stones (called orthostats) dating back to between 2000 and 3000 BCE. However, some artifacts recovered at the site suggest it might have been used even earlier. 

A team led by German archaeologist Hugo Obermaier discovered the monument in 1926 near a town called Peraleda de la Mata.

Among the recovered artifacts were 11 axes, flint knives, ceramics, and a copper punch. A nearby settlement likely housed the people who built the monument, given the presence of houses, charcoal and ash stains, pottery, and stones to hone axes. 

Obermaier restored some of the granite stones to their rightful places and made reproductions of the engravings, which were published in 1960.  READ MORE...

A Galaxy Deeper Back in Time

Data from the Webb Space Telescope has only gotten into the hands of astronomers over the last few weeks, but they've been waiting for years for this, and apparently had analyses set to go. The result has been something like a race back in time, as new discoveries find objects that formed ever closer to the Big Bang that produced our Universe. 

Last week, one of these searches turned up a galaxy that was present less than 400 million years after the Big Bang. This week, a new analysis has picked out a galaxy as it appeared only 233 million years after the Universe popped into existence.

The discovery is a happy byproduct of work that was designed to answer a more general question: How many galaxies should we expect to see at different time points after the Big Bang?

Back in time
As we mentioned last week, the early Universe was opaque to light at any wavelengths that carry more energy than is needed to ionize hydrogen. That energy is in the UV portion of the spectrum, but the red shift caused by 13 billion years of an expanding Universe has shifted that cutoff point into the infrared portion of the spectrum. 

To find galaxies from this time, we have to look for objects that aren't visible at shorter infrared wavelengths (meaning that light was once above the hydrogen cutoff), but do appear at lower-energy wavelengths.

The deeper into the infrared the boundary between invisible and visible is, the stronger the redshift, and the more distant the object is. The more distant the object, the closer in time it is to the Big Bang.  READ MORE...

King Tut"s Meteorite Dagger

Among the many items recovered from King Tut's tomb was a dagger made of iron, which is a material that was rarely used during Egypt's 18th dynasty. 

That iron likely came from a meteorite, and a recent paper published in the journal Meteorites and Planetary Science sheds further light on precisely how that iron dagger was forged, as well as how it came into Tut's possession.

Tutankhamen was the son of Akhenaten and ascended to the throne when he was just 8 or 9 years old. He wasn't considered an especially important pharaoh in the grand scheme of things, but the treasures that were recovered from his tomb in the 1920s are what led to his fame. 

Those treasures included the famous gold burial mask (pictured above), a solid gold coffin, thrones, archery bows, trumpets, a lotus chalice, and various pieces of furniture.

These became part of a global touring exhibition, which received worldwide press coverage during the 1960s and 1970s in particular. 

The mummy even inspired a couple of songs: Steve Martin's hit "King Tut" (which debuted on Saturday Night Live in 1978) and the lesser-known "Dead Egyptian Blues," by the late folk rock singer Michael Peter Smith (which contains the immortal line, "Your sarcophagus is glowing, but your esophagus is showing").  READ MORE...

The International Space Station

The International Space Station is now more than two decades old. And while primary construction of the orbiting laboratory ended a little more than a decade ago, before the retirement of NASA's space shuttle, the station has continued to evolve with smaller modules and an ever-changing array of visiting spacecraft.

Over this time the station has begun to show its age, being exposed to the extreme hot and cold temperatures of space, a vacuum environment, and micrometeoroid debris. 

For more than 20 years, these harsh conditions have worn on the station, inducing stress fractures and other damage.

Following the space shuttle's retirement in 2011, NASA lost the ability to fly humans around the station to catalog these changes with highly detailed photographs. 

But thanks to the emergence of SpaceX's Crew Dragon vehicle, astronauts have started circumnavigating the station once again after undocking and before heading home.

Most recently, the Crew 2 mission led by NASA astronaut Shane Kimbrough undocked from the space station on November 8, and the crew was able to capture multiple views of the space station.  READ MORE...