A new study from the Indian Institute of Science Education and Research (IISER), Mohali, reports the discovery of Pleistocene (2.58 – 0.63 mya) fossils from hitherto unexplored fossil rich areas in the Upper Siwalik group of the Himalayan Mountain Ranges. The explorations, spanning over the last two years, have yielded teeth and bones of ancestral […]
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Ancient DNA (aDNA) from fossil remains continues to shed light on how neuropsychiatric disorders prevalent in modern-day human populations may have originated when modern humans split from neanderthals approximately 500 kya. Writing in Neuropsychopharmacology, Michael Gregory and Karen Berman from the National Institutes of Health bring together multiple comparisons between modern and ancient human genomes […]
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The mouth of the river, where it meets the ocean, is the scene of much action. As the river reaches the ocean, it slows down and deposits sediment. If the river is carrying enough sediment, deposition can create new land, pushing the river mouth further into the sea to form a river delta. The delta, […]
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Marine ecosystems harbour a wide range of species – both that live on the surface of the water body and those that thrive on the bottom of the ocean floor. Temperature and density play a key role in determining the kind of community that comes to inhabit the waterscape; and yet this relationship is not […]
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A recent study shows that the deserts of the world have been inching Northwards since the 1980s and have actually moved more than just the proverbial inch. Writing in Geophysical Research Letters, Hu and Han (2022) report that, in geographical regions such as Central Asia, desert biomes have moved by an order of hundreds of […]
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The Earth is home to a wide variety of species, and a whole gamut of hypotheses exist in order to explain the diversity in life. Most of these draw a link between species richness and physical phenomenon such as climate or seasonality or environmental heterogeneity. This is, for instance, well reflected in what is known […]
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A recent study from CSIR-Centre for Cellular and Molecular Biology, Hyderabad, sheds light on the population structure of western hoolock gibbons (Hoolock hoolock) in the North-Eastern region of India. The species occupies a region marked with large rivers that flow throughout the year and pose a significant geographical barrier to populations on either side from […]
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A recent study has established a connection between teenage alcoholism and brain disorders later in adult life. Bohnsack et al. (2022), reporting in Science this month, argue that excessive consumption of liquor during teenage impacts the amygdala, which is part of the temporal lobe of the brain that is involved with handling memory and emotions. […]
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Most mammals, including humans, are diploid. That is, nuclear DNA (nrDNA) exists as pairs of chromosomes (humans have 23 pairs of chromosomes, while mice have 20). This pair of chromosomes are homologous, in that the sequence of genes on both the chromosomes is the same. However, a gene that sits on a particular address (‘locus’) […]
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