Scientists Determine T. Rex Body Temperature, Unravel Ancient Scrolls, Decode Animal Communication
Researchers have achieved a significant breakthrough in paleontology by obtaining the first direct estimate of a Tyrannosaurus rex's body temperature. Utilizing a novel "paleothermometer" based on the ratios of rare carbon and oxygen isotopes in fossilized tooth enamel, scientists from UCLA determined that T. rex had a body temperature of approximately 36 degrees Celsius (96.8 degrees Fahrenheit), comparable to that of humans. This finding supports the view of T. rex as an active, warm-blooded animal with a robust metabolism. The study, published in Science Advances, also analyzed fossilized teeth from an ancient crocodile, revealing a temperature of around 30 degrees Celsius, consistent with cold-blooded reptiles. This temperature range for T. rex is higher than modern reptiles but lower than most birds, potentially allowing them to remain active in cooler climates.
In a separate development, American researchers have devised a method to read ancient, unrollable papyrus scrolls, such as those found in Herculaneum. By creating and then charring modern papyrus scrolls under controlled, low-oxygen conditions, they replicated the state of scrolls preserved after Mount Vesuvius erupted in 79 AD. Using X-ray fluorescence and tomography, they successfully detected lead in the ink and, with specialized software, deciphered some of the text. This technique, detailed in PLOS One, offers a "virtual unrolling" solution for studying the fragile artifacts from the Herculaneum library.
Meanwhile, scientists from Tel Aviv University and other institutions have highlighted a fundamental limitation in using artificial intelligence to decipher animal communication. Their research, published in Current Biology, demonstrates that while AI can identify acoustic patterns, it struggles to assign meaning to them. By analyzing the sounds of infants, where human interpretation is possible, they found that AI models trained on animal sounds or human speech could not reliably distinguish between different meanings of similar-sounding vocalizations. The researchers conclude that true decipherment requires integrating AI analysis with observations of animal behavior and neurological responses.
Finally, a paleontological discovery in Chile's Atacama Desert has challenged previous assumptions about the region's arid history. The identification of an 8.8-million-year-old tooth belonging to an ancient capybara relative suggests that the area was once significantly wetter, supporting permanent water bodies and lush vegetation during the late Miocene. This finding, reported in Scientific Reports, indicates that the Atacama was not continuously hyper-arid for tens of millions of years and that pathways existed for semi-aquatic animals to travel between inland water systems and the coast.
