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This article discusses the nature of black holes and the different perspectives surrounding them. It explains that black holes are demarcated by an event horizon, beyond which nothing can escape, not even light. The article also explores the effects of gravity on time, known as gravitational time dilation, and how it impacts our perception of objects crossing the event horizon. Additionally, it mentions that black holes can exist without matter and discusses the potential insights that studying the quantum nature of black holes could provide. Overall, the article provides a scientific perspective on black holes and encourages further research in this field. [Extracted from the article]

This document is a collection of letters from readers published in the New Scientist. The letters cover a range of topics, including the concept of time as a quantum illusion, the benefits of using wood in buildings, the limitations of direct air capture for addressing climate change, the relationship between time dilation and entanglement in the quantum realm, the potential dangers of consuming potassium chloride in salt, the possibility of thinking without language, the nature of consciousness and its relationship to causal power, and the potential need for Dyson spheres for advanced civilizations. The letters provide diverse perspectives on these subjects and offer insights into various scientific and philosophical discussions. [Extracted from the article]

Editor's pick Caution required when tinkering with plant diet 8 July, p 17 From Matthew Stevens, Sydney, Australia While the gradual shift to a more sustainable, plant-based diet globally is a good thing, I feel some concern at the news that UK company Moolec has created soya beans with 25 per cent pig protein. In this view, a sufficiently complex brain is necessary, but not sufficient, for consciousness to arise, and if that is so, we need have no worries about even much larger lab-grown brains that need constant supervision to stay alive. Grounds to say lab-grown brains aren't conscious Letters, 24 June From James Whalley, Hinchinbrooke, Quebec, Canada Eric Kvaalen says that if consciousness arises out of brains, we should stop experiments on lab-grown organoids. [Extracted from the article]

Even if these effects make it impossible for ring wormholes to exist, their relative simplicity compared with regular wormholes means studying them could help us understand these quantum wrinkles better, or why time travel seems to be off-limits in our universe, says Wiseman. WORMHOLES are often thought of as tunnels through space-time with black holes for entrances, but they could theoretically be flat instead, like a door into another location, another universe or the past. [Extracted from the article]

AN INTERVIEW WITH PHYSICIST JUN YE ON ATOMIC CLOCKS, TIME DILATION AND TESTING THE LIMITS OF RELATIVITY [ABSTRACT FROM AUTHOR]

News News & Technology Physics WORMHOLES are often thought of as tunnels throughspace-time with black holes for entrances, but they couldtheoretically be flat instead, like a door into another location,another universe or the past. These "ring wormholes" would be made up of a string ofexotic matter with negative energy -- a property that ispossible due to quantum effects, but only, as far as we know,in extremely small amounts. [Extracted from the article]

The article discusses a joint paper published in the journal "Classical and Quantum Gravity" from the film "Interstellar"'s special effects team and scientific consultant Kip Thorne, on the team's decisions to modify real-life models of a black hole deemed to complex for audiences to understand. Topics include the visual effects studio Double Negative and director Christopher Nolan; and elements such as the black hole's accretion disk, spin, color scheme, time dilation, and Doppler shift.

The article discusses a report published in "Science" by researcher Andrew Ludlow and team on the development of a precise atomic clock using energy state transitions of ytterbium atoms cooled by various colors of lasers. The device could be used to define the second at an extremely small scale or detect time dilations which suggest violations of the law of general relativity.

The article discusses the speed at which time moves in distant quasars. According to the author, the big bang theory predicts that time would appear to slow down at greater distances from Earth. Topics include an overview of the expansion of space, an explanation of what quasars are, and why there is a lack of time dilation in quasars. Also discussed are various scientific theories as to why quasars lack time dilution, such as an incorrect calculation of their distances.

Presents a theory on the origin of the astronomical phenomenon called x-ray transients. Explosion of star considered as original inhabitants of the universe; Travel of light across great distance; Citation of time dilation as reason for perceived longer wavelength of light.

Comments on general relativity and time dilatation.