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Scientists were expecting to find an intermediate-mass black hole at the heart of the globular cluster NGC 6397, but instead they found evidence of a concentration of smaller black holes lurking there. New data from the NASA /ESA Hubble Space Telescope have led to the first measurement of the extent of a collection of black holes in a core-collapsed globular cluster.

Globular clusters are extremely dense stellar systems, in which stars are packed closely together. They are also typically very old — the globular cluster that is the focus of this study, NGC 6397, is almost as old as the Universe itself. It resides 7800 light-years away, making it one of the closest globular clusters to Earth. Because of its very dense nucleus, it is known as a core-collapsed cluster.

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All governments across the globe are the same they don’t want a free flow of information that would challenge their authority and decisions that they think are good for us, maybe because they want to maintain law and order in society.

I am against the control of social media by the government and I am also against the algorithms which are designed to make people addicted to social media by showing the thing that appeals most to them for profit.

What are your opinions on this topic, how we can achieve the balance between these challenging aspects of social media use?

In case you missed it at Davos, Ursula von der Leyen’s call for safer social media. 📕.

Continue reading “Social media must not be allowed to destroy democracy, says the EU President” | >

Welcome back to the Daily Aviation for a new documentary video about the DARPA/USMC Ultra Heavy-Lift Amphibious Connector (UHAC) based on the Captive Air Amphibious Transporter (CAAT) project. This video also feature the US Landing Craft Air Cushion (LCAC) and compares it to the UHAC project.

Footage credit: US marine, derivative work by the daily aviation.

Thumbnail credit: US marine, derivative work by the daily aviation.

Voice, text and video editing belong to The Daily Aviation, any use of these content without permission is forbidden.

Continue reading “US Testing a New Million Gigantic Sea “Tank”” | >

Previous studies have shown that AgRP neurons in the arcuate nucleus (ARC) respond to energy deficits and play a key role in the control of feeding behavior and metabolism. Here, we demonstrate that chronic unpredictable stress, an animal model of depression, decreases spontaneous firing rates, increases firing irregularity and alters the firing properties of AgRP neurons in both male and female mice. These changes are associated with enhanced inhibitory synaptic transmission and reduced intrinsic neuronal excitability. Chemogenetic inhibition of AgRP neurons increases susceptibility to subthreshold unpredictable stress. Conversely, chemogenetic activation of AgRP neurons completely reverses anhedonic and despair behaviors induced by chronic unpredictable stress.

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