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How the humble salt marsh softens the ocean’s fury

The boundary between land and sea is neither fixed nor clear. The soil does not suddenly stop and give away to a wall of water. Instead, the line is often a salt marsh, where ocean waves break and lose vim as they pass over the marsh’s elevated surface and push against the stems of salt-tolerant...

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Are humans still evolving?

Evolution is too slow to detect within a single human lifetime | Photo Credit: Getty Images/iStockphoto — Anand Songara, Indore Humans are still evolving — through new mutations, natural selection, migration, and random chance. Modern medicine and technologies have also changed the pressures acting on us. Put one way, evolution can be discerned from changes...

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Gene therapy offers to beat hepatitis B virus by muting its DNA

In 1904, two scientists, Henry Wheeler and Treat Johnson, synthesised a variant of cytosine, one of the building blocks of DNA, in the laboratory. The variant they synthesised contained a chemical tag called a methyl group (-CH3) attached to cytosine, so they called it 5-methylcytosine. Their motivation for doing so was based on the observation...

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Lula’s win gives Brazil an opportunity to cement its climate leadership, but challenges remain

Luiz Inácio Lula da Silva winning his fourth term as Brazil’s President has also interrupted a series of right-wing electoral wins in Latin America. That said, Brazil and Mexico are now the sole left-wing governments among the region’s largest economies. And while it would be reductive to believe the left is more welcoming of climate...

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To make India a richer nation, ensure more green and blue spaces

A canopy of trees provides shade over a road in Chennai, 2022. | Photo Credit: V. Srinivasan/Unsplash Green trees and plants are vital for human health. In villages and farmlands, the uppermost parts of the tree provide a canopy, with roof-like branches, offering people a cooler and healthier environment. And the rivers, canals, ponds and...

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Your DNA says less about your personality than a short online quiz

Decades of psychology have categorised human personality into five broad buckets: openness to experience (curiosity and imagination), conscientiousness (organisation and responsibility), extraversion (sociability), agreeableness (compassion), and neuroticism (a tendency towards anxiety and volatility). In new findings published in Nature, scientists have completed one of the largest-ever genetic analyses of these ‘big five’ traits, offering a...

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What is ‘human composting’ — how does it work?

What should happen to your body after you die? It’s hardly a topic you’d bring up over dinner, but it’s a decision that will eventually need to be made, either by you or by those you leave behind. In Australia, the choice has traditionally been between burial and cremation. However, concerns about environmental impact, limited...

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In Kashmir’s traditional rice, clues to a journey from East Asia

For many generations, Kashmir’s farmers have cultivated traditional varieties of rice — and a new study by researchers at the Sher-e-Kashmir University of Agricultural Sciences and Technology (SKUAST-Kashmir), Srinagar, has found that these varieties carry a unique genetic history. According to the study, published in The Plant Genome, Kashmir’s traditional varieties carry cold-tolerance and other...

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