The year 2025 proved to be exceptionally intriguing for scientific advancements, with discoveries pushing the boundaries of human understanding across multiple disciplines. Among the most bizarre findings was the 'bone collector' caterpillar from Hawaii, a newly identified carnivorous species that camouflages itself by adorning its silken case with the body parts of its insect prey. This macabre survival tactic, widely reported in April 2025, highlights the surprising adaptations found in the natural world. Cosmology presented a perplexing theory suggesting that Earth and the entire Milky Way galaxy might be situated within an immense, low-density cosmic void. Research in July 2025 indicated this 'Hubble bubble' could explain discrepancies in the universe's expansion rate, offering a potential resolution to a long-standing cosmological enigma. Meanwhile, archaeologists in Austria uncovered a remarkably preserved 18th-century mummy, a priest whose body was embalmed through an unprecedented rectal method using wood chips, fabric, and zinc chloride, a discovery that reshapes understanding of historical mummification practices. In genetic engineering, Colossal Biosciences made headlines in April 2025 by announcing the "rebirth" of the American dire wolf. While presented as de-extinction, these three pups (Romulus, Remus, and Khaleesi) were genetically modified gray wolves with dire wolf traits, a significant step in biotechnology with implications for conservation, though some experts nuanced the 'de-extinction' label. Reproductive medicine also saw a landmark event in July 2025 with the birth of a baby in the U.S. from an embryo frozen since 1994, making it the 'world's oldest baby' based on the embryo's storage time and underscoring advances in IVF and cryopreservation. Further innovations included the development of hair-based toothpaste. Research from King's College London, published between August and November 2025, revealed that keratin, a protein found in hair, can effectively repair and protect tooth enamel, offering a sustainable alternative for oral care. In marine biology, killer whales were observed in June 2025 using kelp stalks as tools to massage and groom each other, marking the first documented instance of tool-making for grooming among marine mammals. Additionally, scientists at UC Berkeley successfully created and enabled perception of a new, highly saturated blue-green color named 'olo' in April 2025 by precisely stimulating M cone cells in the retina with lasers, opening new avenues in vision science. Finally, new research continued to explore the influence of the common cat parasite, Toxoplasma gondii, linking it to increased impulsivity and aggressive behaviors in humans, building on previous findings.