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Mosquitoes began biting hominins 1.8 million years ago, study says

Between 1992 and 2020, a group of intrepid scientists walked deep into the forests of Sundaland, across the Malay Peninsula, Sumatra, Java, and Borneo, to collect mosquito larvae of 11 species to understand the evolutionary origins of anthropophily, or the affinity for humans. This effort, the researchers have written in a new paper in Scientific...

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‘Loose connection’ prevented NVS-02 satellite from landing in intended orbit, says panel

After nearly a year’s delay, the Indian Space Research Organisation (ISRO) made public the report of a committee constituted to analyse why the NVS-02 satellite, which was launched aboard a GSLV rocket on January 29 last year, couldn’t be placed in its intended orbit. The apex committee, as it is called, concluded that the main reason...

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What are carbon capture and utilisation technologies? | Explained

The story so far: Carbon Capture and Utilisation (CCU) refers to a set of technologies that capture carbon dioxide emissions from industrial sources or directly from the air and convert them into useful products. This process removes carbon from the atmosphere and puts it into the economy as inputs for fuels, chemicals, building materials, or...

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Why do so many flowers have five petals?

— Ajith Kizhakkethil Many flowers are indeed pentamerous — but across flowering plants as a whole, the petal number varies widely. Monocots often have flower parts in threes. Eudicots have four or five. Many species also have fused petals, others have several petals, and yet others lack them altogether. In the flower bud, new organs...

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The science of taste

The science of taste The Miracle Berry contains a compound called miraculin that binds to sweet receptors and can make acidic foods like lemon taste sweet for about an hour. START THE QUIZ 1 / 5 | You don’t ‘taste’ most of what you call taste. Instead, a large share of the flavour comes from...

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Blue: the colour that moved kings before poets

When Isaac Newton wrote Opticks, published in 1704, he divided the colour spectrum into the now famous VIBGYOR, a set of seven colours (the decision was not, as such, scientific because Newton’s choice was dictated by ‘7’ being a significant number in alchemy.) What Newton observed was a series of hues merging into one another,...

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Scientists confirm HIV capsid is a good drug target despite resistance

In 1987, four years after the discovery of HIV as the causative agent of AIDS, scientists reported the first drug effective against the virus, called zidovudine. Zidovudine targeted a viral enzyme called reverse transcriptase, and prevented the virus from completing its life-cycle. However, zidovudine was no magic bullet. It could hold the virus at bay...

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Why don’t left-handed persons make up half the population?

— Gayatri Chandrashekar A: There’s a neural basis for handedness but it’s not due to any single part of the brain. Hand preference reflects how the brain organises movement control. In most right-handed people, the left hemisphere has stronger control over fine hand movements and also more often dominates language. In left-handed people, these patterns...

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