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Hannah Devlin, theguardian: Scientists have shown the urge to eat after smoking is caused by cannabinoids hijacking brain cells that normally suppress appetite. Caption: Research on the ‘munchies’ side-effect of smoking cannabis has helped scientists understand how the appetite centre of the brain responds to marijuana. Photograph: Alamy

Hannah Devlin, theguardian: Scientists have shown the urge to eat after smoking is caused by cannabinoids hijacking brain cells that normally suppress appetite. Caption: Research on the ‘munchies’ side-effect of smoking cannabis has helped scientists understand how the appetite centre of the brain responds to marijuana. Photograph: Alamy

Synapse in Brain    Deep inside the brain, a neuron prepares to transmit a signal to its target. To capture that expectant, fleeting moment with painstaking detail, science illustrator Graham Johnson based his elegant, highly accurate drawing on ultra-thin micrographs of sequential brain slices. The brain contains billions of neurons, whose network of chemical messages form the basis of all thought, movement and behavior. Johnson's illustration tells the story of one such millisecond signal.

Synapse in Brain Deep inside the brain, a neuron prepares to transmit a signal to its target. To capture that expectant, fleeting moment with painstaking detail, science illustrator Graham Johnson based his elegant, highly accurate drawing on ultra-thin micrographs of sequential brain slices. The brain contains billions of neurons, whose network of chemical messages form the basis of all thought, movement and behavior. Johnson's illustration tells the story of one such millisecond signal.

Killer in the brain could help treat Parkinson's - health - 17 October 2014 - New Scientist (Image: Soledad Galli, Parkinson's UK / University College London)

Killer in the brain could help treat Parkinson's - health - 17 October 2014 - New Scientist (Image: Soledad Galli, Parkinson's UK / University College London)

Gallery for Rosetta mission by theguardian - Caption: The Philae lander is hoisted into position so that it can be connected to the Rosetta spacecraft.

Rosetta's audacious mission to land on a comet – in pictures

Gallery for Rosetta mission by theguardian - Caption: The Philae lander is hoisted into position so that it can be connected to the Rosetta spacecraft.

10 Big Ideas in 10 Years of Brain Science Scientific American Mind reflects on the major discoveries of the past decade that have transformed how we think about the brain.

10 Big Ideas in 10 Years of Brain Science Scientific American Mind reflects on the major discoveries of the past decade that have transformed how we think about the brain.

A stalk-eyed wasp, found in Colombia – and named after a cartoon character – is the very definition of rare, says Quentin Wheeler. Caption: Axima sidi, named after the bug-eyed sloth in Ice Age. Photograph: Courtesy Dr Lars Krogmann

New to Nature No 136: Axima sidi

A stalk-eyed wasp, found in Colombia – and named after a cartoon character – is the very definition of rare, says Quentin Wheeler. Caption: Axima sidi, named after the bug-eyed sloth in Ice Age. Photograph: Courtesy Dr Lars Krogmann

By using optogenetics to trigger REM sleep in mice, a team of researchers from MIT has moved a step closer to being able to produce natural sleep patterns.  In a paper published today in the Proceedings of the National Academy of Sciences, researchers describe how they were able to trigger a p

By using optogenetics to trigger REM sleep in mice, a team of researchers from MIT has moved a step closer to being able to produce natural sleep patterns. In a paper published today in the Proceedings of the National Academy of Sciences, researchers describe how they were able to trigger a p

Pterosaur hunting is illustrated. Credit: Illustration by MARK WITTON, School of Earth and Environmental Sciences, University of Portsmouth - Related: Tricky take-off kept pterodactyls grounded - http://www.eurekalert.org/pub_releases/2014-11/sovp-ttk102714.php

Pterosaur hunting is illustrated. Credit: Illustration by MARK WITTON, School of Earth and Environmental Sciences, University of Portsmouth - Related: Tricky take-off kept pterodactyls grounded - http://www.eurekalert.org/pub_releases/2014-11/sovp-ttk102714.php

New research reveals the first experimental evidence that our solar system’s protoplanetary disk was shaped by an intense magnetic field that drove a massive amount of gas into the sun within just a few million years. Caption: Magnified image of the section of the Semarkona meteorite used in this study. Chondrules are millimeter sized, light-colored objects. Image: MIT Paleomagnetism Laboratory

New research reveals the first experimental evidence that our solar system’s protoplanetary disk was shaped by an intense magnetic field that drove a massive amount of gas into the sun within just a few million years. Caption: Magnified image of the section of the Semarkona meteorite used in this study. Chondrules are millimeter sized, light-colored objects. Image: MIT Paleomagnetism Laboratory

Around 90 percent of these losses were from the 36 most common and widespread species, including house sparrows, skylarks, grey partridges and starlings. Credit: Tomas Belka, birdphoto.eu - Related: Study reveals startling decline in European birds - http://www.eurekalert.org/pub_releases/2014-11/uoe-srs103014.php

Around 90 percent of these losses were from the 36 most common and widespread species, including house sparrows, skylarks, grey partridges and starlings. Credit: Tomas Belka, birdphoto.eu - Related: Study reveals startling decline in European birds - http://www.eurekalert.org/pub_releases/2014-11/uoe-srs103014.php

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