Biological adaptation is the evolutionary process through which heritable traits that enhance an organism’s fitness become more prevalent in a population over generations under specific environmental conditions. It operates primarily via natural selection acting on genetic variation, including mutations, recombination, and gene flow, and is constrained by developmental, genetic, and phylogenetic factors. Adaptations can be morphological, physiological, or behavioral and are typically characterized by increased survival or reproductive success in a given niche. The process is dynamic and context-dependent, such that traits advantageous in one environment may be neutral or deleterious in another, contributing to diversification and speciation.
Expose an animal to extreme physical stress, and the expectation is simple: It will break down. But when UC Riverside scientists subjected fruit flies to forces many times stronger than Earth's gravity—a condition called ...
Space Exploration
May 1, 2026
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Scientists have shown that evolution has been using the same genetic "cheat sheet" for over 120 million years, suggesting that life on Earth may be more predictable than first imagined. The international team, led by scientists ...
Ecology
Apr 30, 2026
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Diving is physiologically challenging for marine animals. Long and deep dives can trigger "anaerobic" (oxygen-less) metabolism in organs other than the heart and brain that causes lactic acid to accumulate. Even though diving ...
Plants & Animals
Apr 30, 2026
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Scientists have used an online game to discover the secrets of animal camouflage—such as why tigers have stripes. The study, by the universities of Exeter and Bristol, reveals that high-contrast markings like tiger stripes ...
Plants & Animals
Apr 29, 2026
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Our cells adjust to ever-changing conditions while preserving internal states necessary for survival, but exactly how they achieve both adaptability and stability remains unclear. For the first time, researchers have used ...
Cell & Microbiology
Apr 27, 2026
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They already have the bill of a duck, the tail of a beaver, lay eggs like reptiles and have venom like snakes.
Plants & Animals
Apr 25, 2026
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As global warming accelerates, extreme heat waves are causing widespread death of tropical reef corals. Most corals rely on tiny algae cells living within their tissues that photosynthesize and produce energy. Corals use ...
Ecology
Apr 25, 2026
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One of the biggest challenges in cancer research is understanding why some tumor cells become especially aggressive, invasive and resistant to treatment. Scientists have increasingly linked these dangerous traits to polyploid ...
Cell & Microbiology
Apr 24, 2026
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From butterflies to peacocks, bold circular "eyespots" are among nature's most eye-catching patterns. But why do they appear in some animals and not others? A new study of skates and rays finally provides an answer—and it ...
Evolution
Apr 24, 2026
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60
In a first-of-its-kind finding, researchers at University of Iowa Health Care discovered that specific genetic sequences have an outsized impact on humans' language abilities and that these sequences evolved before humans ...
Evolution
Apr 23, 2026
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