First-Time Detection of Ammonia-Containing Compounds in Europe: Key Findings and Implications

A recent analysis of archival data from NASA’s Galileo spacecraft’s Near Infrared Mapping Spectrometer (NIMS) has uncovered the first evidence of ammonia-containing compounds on Jupiter’s icy moon Europa. This groundbreaking discovery provides vital clues about Europa’s subsurface ocean and recent geological activity.



This composite image highlights red pixels indicating sites on Europa where ammonia compounds were detected; purple indicates areas without detection. Image credit: NASA/JPL-Caltech.

“The detection of ammonia (NH3) is significant for understanding not only the geology of icy bodies in our solar system but also their potential habitability and astrobiological relevance,” stated Dr. Al Emran, a researcher at NASA’s Jet Propulsion Laboratory.

“On Europa, the identification of ammonia or ammoniated species is crucial for revealing ocean chemistry, assessing habitability, and reconstructing the moon’s early atmosphere.”

Ammonia functions as an antifreeze agent, reducing the freezing point of liquid water by up to 100 K, which may help preserve underground oceans in icy celestial bodies.

Though it’s unclear if Europa’s underground ocean is directly linked to the surface, detecting ammonia compounds could imply such a connection, given that these materials are unstable under cosmic radiation.

In a new study published in Planetary Science Journal, Dr. Emran reported detecting a distinct ammonia absorption feature at 2.20 microns in Europa’s near-infrared spectrum.

This signal was confirmed through observations from Galileo’s NIMS instrument, which examined Europa during a flyby in the 1990s.

Ammonia hydrate and ammonium chloride are likely responsible for the detected spectral features.

The instability of ammonia under strong cosmic radiation highlights the importance of its presence on Europa’s surface.

The discovery of ammonia-containing materials suggests they may have originated from Europa’s subsurface ocean or shallow subsurface during the moon’s geologically recent past, possibly through cryovolcanism or similar processes.

This analysis also hints at significant implications for Europa’s internal structure.

The presence of ammoniated compounds aligns with a subsurface ocean characterized by a thinner, chemically reduced ice shell with a higher pH.

Ammonia’s antifreeze properties are essential, as they lower the freezing point of water ice, allowing for the maintenance of a liquid ocean beneath Europa’s icy shell.

“Faint signals of ammonia have been detected near fractures in the moon’s frozen surface, where liquid water, rich in dissolved ammonia compounds, is expected to ascend,” Emran noted.

“These compounds might have traversed the surface due to recent geologically active cryovolcanic events.”

Ammonia’s presence, which significantly lowers the freezing point of water, acts as a natural antifreeze.

Similar ammonia-bearing species have been identified on other icy objects in the outer solar system, including Pluto, Charon, certain moons of Uranus, and Saturn’s moon Enceladus. However, earlier attempts to confirm ammonia’s presence on Europa produced inconclusive results.

“The identification of ammonia-containing compounds in this research marks the first evidence of nitrogen-based species on Europa, a finding of considerable astrobiological importance due to nitrogen’s fundamental role in life’s molecular structure,” Emran concluded.

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A. Emran. 2026. NH3 detection at Europa’s 2.2 μm absorption band. Planetary Science Journal 6,255; doi: 10.3847/PSJ/ae1291

Source: www.sci.news

The Endangered Galapagos Turtle Welcomes 100 Hatchlings as First-Time Mother

Congratulations, mommy, Galapagos turtle, and longtime resident of the Philadelphia Zoo, recently became their first mother at an estimated age of 100.

Mom, People who have lived in the zoo since 1932layed 16 eggs in November. Four of them have been hatched. It was the first successful hatching of her species at the zoo, which opened in 1874.

Of course, she had helped. Abrazo, male turtle, is estimated to be about a century ago.

Mama and Abrazo, members of the West Santa Cruz subspecies, are the oldest animals at the Philadelphia Zoo. But Galapagos turtles can live up to 200 years longer, the zoo said.

The first hatching was released on February 27th, and the zoo announced it on Thursday. The others continued within a few days, with the last one being hatched on March 6th.

Neither of the hatching has been named, but is expected to be in the public eye from April 23rd, the zoo said. According to Lauren Augustine, director of herpetology at the zoo, they do “fantasy.” (Herpetology refers to the study of reptiles and amphibians.)

“They’re the size of tennis balls and they’re actually pretty good,” Augustine said.

The turtles in the West Santa Cruz Galapagos are International Union for Conservation of Nature. According to the Philadelphia Zoo, before the new arrival, there were only 44 giant turtles in West Santa Cruz at every zoo in the United States.

Baby turtles will not share the same physical space as their parents. Their impressive size – Abrazo is 410 pounds, and Mama is about 280 pounds – poses the risk of crushing the hatch ring.

Unlike his peers, Abrazo is not his first parent. In 2011 he was part of a successful pairing; Unexpected discoveries of five hatching His previous home is Riverbanks Zoo and Gardens in Columbia, South Carolina

Abrazo came to the Philadelphia Zoo on the recommendation of the Zoo and Aquarium Association.

Abrazzo and Mommy were introduced in 2022, and Mama began laying eggs in 2023. She has now laid four rounds of eggs. The first three rounds were not feasible. But the fourth was.

Once she laid eggs, members of the zoo staff were set up to weigh, measure, and artificially incubate at two different temperatures.

All four hatch rings born this year are women, but Augustine said three more eggs are still being raised.

“It’s kind of testimony through the excellent care that she has to take at the institution,” said Stephen Diver, a professor of zoology medicine at the University of Georgia. “It’s not easy to keep a huge tropical turtle in the Northern Hemisphere properly.

Being hatched will be taken prisoner for at least five years. The zoo then decides what to do with them, Consultation with the Zoo and Aquarium Association. If they were genetic matches for other turtles, they could either end up at another zoo or spend their days in the wild in the Galapagos Islands off the coast of Ecuador. But that would take a risk, said Rachel Metz, vice president of animal welfare at the Philadelphia Zoo.

They are at extreme risk from natural disasters, potentially diseases, climate change and invasive species,” she said.

Centuries ago, the Galapagos turtle population reached hundreds of thousands, but it fell over time as it was hunted for human consumption. However, in half a century, the population recovered. Up to about 17,000 For conservation and breeding programs.

Although estimates of the population of turtles in West Santa Cruz vary widely, Stephen Blake, an assistant professor of biology at St. Louis University who has worked extensively with turtles in the Galapagos, says it is likely to be thousands. The population appears to be growing steadily, he said.

The population is small and prisoner reproduction is very rare, so hatching would give researchers the opportunity to study turtles from young ages in captivity, said Juan Manuel Vazquez, a biologist who studied aging in long-standing living animals. Includes Galapagos turtles.

“Additional turtles count,” he said.

Dr. Blake said it is not uncommon for Galapagos turtles to breed in 100 in the wild. Given that, hatching the Philadelphia Zoo is unlikely to have a major impact on conservation efforts, but it could help raise awareness about the massive turtles in general.

In my opinion, this is not intended to do much for what is happening in the wild directly, reproducing a turtle. But indirect terms, zoos can promote the wonder of producing 100-year-old reptiles for the first time, and use it as a means to surprise them among people.. ”

Source: www.nytimes.com

First-time mating humpback whale engages in homosexual behavior

Experts have revealed that this is the first time a humpback whale of this species has been documented engaging in any form of sexual activity.

The social behavior of humpback whales has been extensively observed and documented for many years. However, in a recent study published in Marine Mammal Science, researchers shared the first photographs of this species engaging in sexual intercourse.

The report was authored by marine biologist Stephanie Stack and two photographers, Lyle Kranichfeld and Brandi Romano, who captured the interaction in January 2022 in the waters off the coast of Maui, Hawaii.

Kranichfeld, 44, remarked, “We recognized the scientific importance of this event. Even if our findings were not published or did not lead to any significant outcomes, we understood that this unique behavior was significant for the scientific community and those studying whales.”

The encounter involved a male whale that seemed to be unhealthy or injured and a healthy male whale. The report mentioned that the ailing whale appeared weakened and infested with lice, which are known to thrive on debilitated humpback whales.

The researchers suggested that the weakened whale may have sought refuge near the photographer’s boat to protect itself from other whales. Kranichfeld emphasized that they never approached the whales in the water or attempted to swim with them, as both actions are illegal.

Tragically, the emaciated whale eventually succumbed after circling the boat and trying to swim away from the healthier whale. The healthy whale then used its pectoral fins to hold the other whale in place and engaged in sexual activity.

Source: www.nbcnews.com