Ammonites' fate sealed by meteor strike that wiped out dinosaurs
Ammonites were not in decline before their extinction, scientists have found.
Ammonites were not in decline before their extinction, scientists have found.
Paleontology & Fossils
Jun 27, 2024
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383
The relationship between mother and child may offer clues to the mystery of why humans live longer lives than expected for their size—and shed new light on what it means to be human.
Evolution
Jun 17, 2024
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81
Swimming through turbulent water is easier for schooling fish compared to solitary swimmers, according to a study published June 6 in the open-access journal PLOS Biology by Yangfan Zhang of Harvard University, Massachusetts, ...
Plants & Animals
Jun 6, 2024
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0
The beginning of life on Earth and its evolution over billions of years continue to intrigue researchers worldwide. The central dogma or the directional flow of genetic information from a deoxyribose nucleic acid (DNA) template ...
Molecular & Computational biology
Apr 18, 2024
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141
Many artists have tried to depict what Earth might have looked like billions of years ago, before life made its appearance. Many scenes trade snow-covered mountains for lava-gushing volcanoes and blue skies for lightning ...
Earth Sciences
Mar 13, 2024
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8
Charles Darwin described evolution as "descent with modification." Genetic information in the form of DNA sequences is copied and passed down from one generation to the next. But this process must also be somewhat flexible, ...
Evolution
Mar 4, 2024
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342
In a new study, scientists have investigated the pervasive low-rank hypothesis in complex systems, demonstrating that despite high-dimensional nonlinear dynamics, many real networks exhibit rapidly decreasing singular values, ...
How the intricate molecular machinery of life arose from simple beginnings has been a long-standing question. Several lines of evidence point towards a primordial "RNA world," where an "RNA copy machine" (a so-called replicase) ...
Evolution
Jan 16, 2024
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95
Over the coming few years, hundreds of thousands of people are expected to come to Canada to work, study and settle. This year, the federal government has set a target of welcoming 485,000 new permanent residents.
Social Sciences
Jan 8, 2024
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7
Human aging may have been influenced by millions of years of dinosaur domination according to a new theory from a leading aging expert. The 'longevity bottleneck' hypothesis has been proposed by Professor Joao Pedro de Magalhaes ...
Evolution
Nov 29, 2023
2
1617
A hypothesis (from Greek ὑπόθεσις [iˈpoθesis]) consists either of a suggested explanation for an observable phenomenon or of a reasoned proposal predicting a possible causal correlation among multiple phenomena. The term derives from the Greek, hypotithenai meaning "to put under" or "to suppose." The scientific method requires that one can test a scientific hypothesis. Scientists generally base such hypotheses on previous observations or on extensions of scientific theories. Even though the words "hypothesis" and "theory" are often used synonymously in common and informal usage, a scientific hypothesis is not the same as a scientific theory. A hypothesis is never to be stated as a question, but always as a statement with an explanation following it. It is not to be a question because it states what the experimenter thinks will occur. Hypotheses are usually written in the "if-then form": If X, then Y.
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