All articles tagged with #origins of life
Astronomers have detected erythrulose, a four-carbon sugar, in a molecular cloud near the Milky Way’s center, marking the first true sugar found in interstellar space and supporting ideas that complex organic molecules crucial to life can form in space and may have been delivered to early Earth via comets and meteorites.
A six-year study of irradiated, life-free soil shows ongoing CO2 release and oxygen consumption, plus measurable electron flow and Krebs-cycle intermediates, suggesting metal- and mineral-catalyzed, metabolism-like chemistry can occur outside living cells and may predate life; while these findings support a geology-driven view of metabolism, the possibility that residual enzymes could contribute cannot be completely ruled out.
New high-sensitivity analyses of asteroid samples confirm all five nucleobases (A, C, G, T, U) in Ryugu, adding to prior Bennu detections and resolving earlier Ryugu results. The finding reinforces the idea that space-based chemistry can produce nucleotides and informs potential prebiotic pathways, though it does not imply life, and contamination concerns are addressed. The study also notes a correlation between purine/pyrimidine levels and ammonia across asteroids, offering clues about the reactions that could occur in space and feed theories on how Earth's life's building blocks arrived.
Astronomers have identified the largest sulfur-containing molecule ever seen in interstellar space—a 13-atom compound called 2,5-cyclohexadiene-1-thione—within a molecular cloud about 27,000 light-years from Earth. The discovery, made using radio telescopes IRAM-30m and Yebes and confirmed by a laboratory-synthesized radio fingerprint, fills a gap between simple space chemistry and the complex molecules tied to life. Researchers say sulfur-bearing molecules may be far more common in space than previously thought and could be delivered to early Earth via comets and meteorites, helping to bootstrap the chemistry that led to life. The finding suggests many more such sulfur-rich molecules could be detected in the future.
NASA's analysis of samples from asteroid Bennu revealed the presence of sugars and a unique 'space gum' substance, providing insights into the building blocks of life and the early solar system's formation, which could have played a role in the origin of life on Earth.
New research challenges the long-held belief that a specific protein motif was the fundamental building block of early life, suggesting it is just one of many possible structures and reshaping our understanding of protein evolution and the origins of life.
A study of ancient zircon crystals from the Australian outback reveals that Earth had dry land and fresh water 4 billion years ago, challenging the belief that the planet was entirely ocean-covered at that time. This discovery suggests that the conditions necessary for life existed much earlier than previously thought, providing new insights into Earth's early history and the origins of life.
Scientists at the Salk Institute have discovered an RNA enzyme that can accurately replicate and evolve RNA strands, providing strong evidence for the RNA World hypothesis and shedding light on the origins and complexity of life. This breakthrough brings researchers closer to synthesizing RNA-based life in the laboratory, offering insights into early evolution and the potential for autonomous RNA life. The study underscores the critical role of replication fidelity in enabling evolution and paves the way for future experiments testing other ideas about the origins of life.
Researchers at the University of Hawaiʻi at Mānoa have synthesized glyceric acid, a critical molecule for the metabolism of living organisms, for the first time in low-temperature conditions mimicking deep space. This discovery sheds light on the potential formation of important biomolecules in interstellar ices and their possible role in the development of life on planets like Earth. The study suggests that molecules like glyceric acid could have been synthesized in molecular clouds and star forming regions before being delivered to Earth via comets or meteorites, contributing to the building blocks of life. The findings provide valuable insights into the origins of life and the interconnected chemistry of our bodies with the chemistry of space.
New research at the Salk Institute provides compelling evidence supporting the RNA World hypothesis, suggesting that the origins of life may have involved molecular-scale evolution in RNA. The study unveils an RNA enzyme capable of making accurate copies of other functional RNA strands and allowing new variants to emerge over time, bringing scientists closer to re-creating RNA-based life in the laboratory. The findings highlight the critical importance of replication fidelity in making evolution possible and pave the way for future experiments testing other ideas about the origins of life.
Scientists from Tohoku University have suggested that the origins of life on Mars could be linked to the presence of atmospheric formaldehyde, which could have led to the formation of biomolecules when the planet had liquid water. Their study, published in Scientific Reports, used a computer model to simulate Mars' conditions and concluded that the atmosphere likely contained formaldehyde due to the presence of carbon dioxide, hydrogen, and carbon monoxide. This research provides encouraging signs for the potential existence of past life on the Red Planet.
Scientists from Tohoku University have suggested that the origins of life on Mars could be linked to the presence of atmospheric formaldehyde, which could have led to the formation of biomolecules when the planet had liquid water. Their study, published in Scientific Reports, used a computer model to simulate Mars' conditions and concluded that the presence of carbon dioxide, hydrogen, and carbon monoxide in the atmosphere could have facilitated the formation of organic compounds. This research provides encouraging signs for the potential existence of past life on the Red Planet.
Scientists from Tohoku University have suggested that the origins of life on Mars could be linked to the presence of atmospheric formaldehyde, which could have led to the formation of biomolecules when the planet had liquid water. Their study, published in Scientific Reports, used a computer model to simulate Mars' conditions billions of years ago and concluded that the atmosphere likely contained formaldehyde due to the presence of carbon dioxide, hydrogen, and carbon monoxide. This research provides encouraging signs for the potential existence of past life on the Red Planet.
NASA's OSIRIS-REx spacecraft collected a surprising 4.3 ounces (122 grams) of material from the asteroid Bennu, potentially containing some of the earliest precursors for life. The sample, the first ever retrieved by a NASA mission, was initially hindered by stuck fasteners on the capsule, but after disassembly, scientists managed to retrieve the full amount. The material, dating back 4.5 billion years, may hold primordial elements that contributed to the origins of life on Earth, similar to findings from the asteroid Ryugu.
NASA's OSIRIS-REx spacecraft collected a surprising 4.3 ounces (122 grams) of rocky space rubble from the asteroid Bennu, more than double the expected amount, potentially containing some of the earliest precursors for life. After encountering difficulties disassembling the capsule, scientists managed to retrieve the full sample, which includes 4.5 billion-year-old rocks and primordial elements believed to have sparked life on Earth. This marks the first time a NASA mission has retrieved a space rock, and researchers are hopeful for finding biological precursors within the sample.