Thursday , February 22 2018

Biology

Researchers Find Previously Unknown Structure in Human Spermatozoon Tails

By using cryo-electron tomography, an international team of scientists has identified a completely new nanostructure — named the Tail Axoneme Intra-Lumenal Spiral (TAILS) — inside human spermatozoon tails. The human spermatozoon tail is a highly complex machine that consists of around a thousand different types of building blocks. Image credit: …

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Scientists Complete Butterfly Evolutionary Tree

An international team of lepidopterists has compiled the most comprehensive evolutionary tree for butterflies to date. The results appear in the journal Current Biology. First comprehensive map of butterfly evolution: branch support is color coded according to the support thresholds indicated on the legend, and the shape indicates whether the …

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Study: First Land Plants Appeared 500 Million Years Ago

According to a new study to be published in the Proceedings of the National Academy of Sciences, the first plants to colonize the Earth originated around 500 million years ago (Cambrian period) — 100 million years earlier than previously thought. Rhynia gwynne-vaughanii, 400 million-year-old fossil plant stem from Aberdeenshire, Scotland. …

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New Species of Pygmy Squid Discovered

James Cook University researcher Dr. Jan Strugnell and Australian Museum Research Institute’s Dr. Mandy Reid have discovered and described a new species of pygmy squid in Australian waters. The Hallam’s pygmy squid (Idiosepius hallami), attached to a seagrass blade, Cudgen Creek, northern New South Wales. Image credit: Mandy Reid. “Although …

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Giant Viruses May Have Played Important Role in Evolution of Life

Dr. Albert Erives, a biologist at the University of Iowa, has identified a virus family whose set of genes is similar to that of eukaryotes, an organism classification that includes all plants and animals. The finding is important because it helps clarify how eukaryotes evolved after branching from prokaryotes (single-celled …

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Chimps’ Self-Control is Related to General Intelligence: Study

Chimpanzees’ overall intelligence is correlated to their ability to exert self-control and delay gratification, according to a study published in the journal Current Biology. This is the first study to examine the relation between general intelligence scores and delayed gratification abilities in common chimpanzees (Pan troglodytes). Image credit: Bernd Hildebrandt. …

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Venus Flytraps Don’t Trap Their Pollinators

Scientists have for the first time discovered which insects pollinate a rare carnivorous plant called the Venus flytrap (Dionaea muscipula) — and found that the flytrap doesn’t dine on its pollinator species. Venus flytrap in its native habitat. Image credit: Clyde Sorenson. “Everybody’s heard of Venus flytraps, but nobody knew …

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