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Jun 9, 2020

This NASA Astronaut Just Became the First Woman to Dive to the Ocean’s Deepest Point

Posted by in category: space

After her dive yesterday, Dr. Kathy Sullivan spoke to astronauts on the International Space Station to compare notes about “recyclable” vessels for undersea and space exploration.

Jun 9, 2020

Alien Carnivorous Frog Invasion Wreaks Havoc on Natural Habitat

Posted by in categories: education, government, habitats

“The state government should consider managing the invasive population of spotted-thighed frogs at Streaky Bay. This should include education programs to inform people about what to do if they find a frog, as well as the feasibility of exterminating the population in South Australia.

“Importantly, if you do see one of these critters in your travels – leave it be. We don’t want it hitchhiking any further.”

Reference: ” Indiscriminate feeding by an alien population of the spotted-thighed frog (Litoria cyclorhyncha) in southern Australia and potential impacts on native biodiversity” by Christine M. Taylor, Gunnar Keppel, Shaun O’Sullivan, Stefan Peters, Gregory D. Kerr and Craig R. Williams, 9 April 2020, Australian Journal of Zoology. DOI: 10.1071/ZO19042

Jun 9, 2020

Spontaneous Brain Oscillations and Perceptual Decision-Making

Posted by in category: neuroscience

Making rapid decisions on the basis of sensory information is essential to everyday behaviors. Why, then, are perceptual decisions so variable despite unchanging inputs?

Spontaneous neural oscillations have emerged as a key predictor of trial-to-trial

Perceptual variability. New work casting these effects in the framework of models.

Jun 9, 2020

Why do Crew Dragon astronauts need to climb up one level using the stairs before ingress?

Posted by in category: space travel

While watching the launch of SpaceX Crew Dragon, I noticed that, once the astronauts came out of the elevator in the fixed service structure, they had to ‘climb up’ one level using the stairs, before entering the white room through the crew access arm. I’m curious to know why doesn’t the elevator take them directly to the crew access arm level?

Earlier, I thought the reason might be due to the height difference between the side hatches on the Space Shuttle and Crew Dragon. But after seeing the following image it became evident that the difference is more than one level:

Continue reading “Why do Crew Dragon astronauts need to climb up one level using the stairs before ingress?” »

Jun 9, 2020

Appetite can be increased by cells in the brain

Posted by in categories: food, neuroscience

It has previously been discovered that tanycytes—cells found in part of the brain that controls —detect nutrients in and tell the brain directly about the food we have eaten.

Tanycytes do this by responding to found in foods, via the same receptors that sense the flavor of amino acids (“umami” taste), which are found in the taste buds of the tongue.

In the paper ‘Hypothalamic tanycytes generate acute hyperphagia through activation of the arcuate neuronal network.’ published today, the 8th June, in the journal PNAS, researchers from the School of Life Sciences at the University of Warwick, explain how tanycytes can increase appetite.

Jun 9, 2020

Scientists engineer one protein to fight cancer and regenerate neurons

Posted by in categories: biotech/medical, neuroscience

Our lungs, bones, blood vessels and other major organs are made up of cells, and one way our bodies keep us healthy is by using protein messengers known as ligands that bind to receptors on the surfaces of cells to regulate our biological processes. When those messages get garbled, it can make us ill with a host of different diseases.

Jun 9, 2020

Repetitive negative thinking is associated with amyloid, tau, and cognitive decline

Posted by in categories: biotech/medical, neuroscience

The Cognitive Debt hypothesis proposes that repetitive negative thinking (RNT), a modifiable process common to many psychological risk factors for Alzheimer’s disease (AD) may itself increase risk. We sought to empirically examine relationships between RNT and markers of AD, compared with anxiety and depression symptoms.

Jun 9, 2020

NASA astronaut Victor Glover explains why sometimes we can’t just stick to space

Posted by in category: space travel

As Americans took to the streets in protest and NASA astronauts took to the skies on a commercial spacecraft, some space fans had a question: “Can’t we just do space?”

Jun 9, 2020

Ultrathin nanosheets separate ions from water

Posted by in category: futurism

In a world-first, an international research team, led by Monash University and ANSTO, has created an ultrathin porous membrane to completely separate potentially harmful ions, such as lead and mercury, from water.

Jun 9, 2020

‘Whispering Gallery’ Effect Allows Light to Be Stored and Controls Electron Beams

Posted by in category: quantum physics

Artist’s view of individual electrons interacting with an optical whispering gallery mode as it circles a silica sphere. The matching between the velocities of the electron and the light-wave it is riding changes the quantum state of the electron, illustrated as a wider halo. Credit: Dr. Murat Sivis.