Science
Wednesday, January 20, 2021

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 Spinach Leaves and Blood

Researchers face a fundamental challenge as they seek to scale up human tissue regeneration from small lab samples to full-size tissues, bones, even whole organs to implant in people to treat disease or traumatic injuries: how to establish a vascular system that delivers blood deep into the developing tissue.

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fire of london monument top 

The Monument is one of London’s most famous landmarks, even giving its name to a local Tube stop. But this tribute to London’s greatest fire also has a secret second use – as a giant piece of scientific equipment. “I’ll just open the hatch...” says Richard Smith, who is stooped over in the ticket office at the Monument. He’s examining the oak-panelled floor as though it’s hiding a secret chamber, as in an Indiana Jones movie. Above him, a desk is piled high with leaflets “This is to certify that "such individual" has climbed the 311 steps of the Monument”. The thing is, there are actually 345.

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 Cabage Butterflies 

Sex is often complicated. Couples can become muddled in fraught dynamics, power struggles and conflicts between short-term desire and long-term vision. Of course, we are talking about butterfly sex here. Researchers at the University of Cincinnati have pulled the curtain back on the mating habits of the cabbage white butterfly, also known as Pieris rapae. Their previously unknown theatrics are overflowing with complexity that would put the most melodramatic human couples to shame.

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Richard Gray Reconstruction of Neanderthal face

The face of a modern human is almost uniquely flat and extraordinarily expressive. But our remarkable faces may not be as "modern" as we think. (A reconstruction of a Neanderthal face is illustrated above). These reconstructed faces look impassive, but a range of emotions are painted onto visitors' faces at the Natural History Museum in London.

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Analemma

A lemniscate is any of several figure-eight orshaped curves. The word comes from the Latin "lēmniscātus" meaning "decorated with ribbons", from the Greek λημνίσκος meaning ribbons.  In astronomy, an analemma (from Greek ἀνάλημμα analēmma "support") is a diagram showing the deviation of the Sun from its mean motion in the sky, as viewed from a fixed location on the Earth. An analemma can be traced by plotting the position of the Sun as viewed from a fixed position on Earth at the same clock time every day for an entire year, or by fixed camera taking time lapse pictures throughout one year. The resulting curve resembles a long, slender figure-eight with one lobe much larger than the other, known as a lemniscate of Bernoulli.