科学与环境
97-million-year-old fossils reveal the earliest known animal “GPS”
来源: All Top News -- ScienceDaily · 发布于
Mysterious 97-million-year-old magnetic fossils may be the oldest evidence of an animal using Earth’s magnetic field like a built-in GPS. Their sophisticated magnetic structure could have helped an unknown ocean creature navigate thousands of kilometers with surprising precision.
Mysterious 97-million-year-old magnetic fossils may be the oldest evidence of an animal using Earth’s magnetic field like a built-in GPS. Their sophisticated magnetic structure could have helped an unknown ocean creature navigate thousands of kilometers with surprising precision.
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This 245-million-year-old fossil still has its stomach and intestines
A 245-million-year-old marine reptile fossil preserves an astonishing amount of detail, including its stomach, liver, and intestines. The discovery reveals that Austronaga minuta was highly adapted for swimming even though its digestive system remained surprisingly simple.
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160-million-year-old proteins show surprising power against superbugs
Scientists resurrected antimicrobial peptides from mammals that lived millions of years ago and found that some were more potent against drug-resistant bacteria than modern human versions. These evolutionary relics could provide new clues for designing treatments as antibiotic re
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Scientists may have misread a 2-billion-year-old clue about Earth
Scientists have found that a famous 2-billion-year-old chemical signature, once thought to record a massive global change in Earth’s carbon cycle, may instead have been produced by local magma, hydrocarbons, and methane-eating microbes. The discovery raises new questions about wh
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Chang’e-6 lunar soil contains a surprising magnetic time capsule
Scientists studying Chang’e-6 lunar soil have discovered a previously unknown magnetic mineral in natural Moon samples: a form of metallic iron called γ-Fe. Found inside tiny impact-glass particles, the nanoscale iron can preserve a stable magnetic signal, potentially acting like
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Scientists discover first type I superconductor that breaks time-reversal symmetry
Superconductors are materials that conduct electricity with no resistance and expel magnetic fields when cooled to ultralow temperatures. And depending on their quantum structure, they can also showcase strange properties like magnetic levitation. But now things are getting a lit
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