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Jul 11, 2021

Observing satellite startup Planet is going public

Posted by in category: satellites

The deal values the San Francisco-based company at $2.8 billion.


Planet, which operates the world’s largest fleet of Earth-observing satellites, announced Wednesday (July 7) that it will merge with a special purpose acquisition company.

Jul 11, 2021

Wanna Delay Aging? Get Castrated, Scientists Say

Posted by in categories: biotech/medical, life extension

Any volunteers?

Jul 11, 2021

BREAKING: Richard Branson Successfully Flies to Space on Virgin Rocket

Posted by in category: space

Billionaire Richard Branson has successfully flown aboard the V.S.S. Unity to outer space — reaching an altitude of more than 50 miles above Earth.

Jul 11, 2021

Massive solar storm heading towards Earth can impact GPS, mobile signal. Details here

Posted by in categories: mobile phones, satellites

According to NASA, the solar storm is travelling towards Earth at a velocity of 1.6 million km/hr and the speed might even increase more.

The satellites in the Earth’s upper atmosphere are also expected to get impacted by the incoming flares. This will directly impact GPS navigation, mobile phone signal and satellite TV. The power grids can also be impacted due to the solar flares.

On the positive side, the solar flares will create an amplified view of Aurora lights in North or South Pole. The people living near the poles will get to experience these lights.

Jul 11, 2021

First robotic pizza restaurant opens in Paris

Posted by in categories: food, robotics/AI, sustainability

A new pizzeria, called Pazzi, is staffed entirely by robots, which can handle everything from order-taking to prepping the dough, to boxing the finished meal.

The restaurant, found in the Beaubourg area of Paris, has taken eight years of research and development. Its creators are two inventors, Cyril Hamon and Sébastien Roverso – both passionate about robotics and electronics since childhood – who began designing the machines in a family garage. Their goal has been to reinvent the fast food experience with a fully automated system that is more convenient and empowering to customers, while maintaining the same or better quality food as conventional restaurants and also being environmentally sustainable.

Pazzi builds on the success of a pilot, tested at the Val d’Europe shopping centre in 2019. The 120m² establishment is more visible and centrally located than that earlier demonstration, being opposite the famous Pompidou centre, benefiting from a high attendance.

Jul 11, 2021

Unlocking the ‘gut microbiome’ – and its massive significance to our health

Posted by in categories: biotech/medical, health

Scientists are only just discovering the enormous impact of our gut health – and how it could hold the key to everything from tackling obesity to overcoming anxiety and boosting immunity by .

Jul 11, 2021

Islands behind the horizon

Posted by in categories: cosmology, mathematics, neuroscience

Math about black holes:


If you’ve been following the arXiv, or keeping abreast of developments in high-energy theory more broadly, you may have noticed that the longstanding black hole information paradox seems to have entered a new phase, instigated by a pair of papers [1, 2] that appeared simultaneously in the summer of 2019. Over 200 subsequent papers have since appeared on the subject of “islands”—subleading saddles in the gravitational path integral that enable one to compute the Page curve, the signature of unitary black hole evaporation. Due to my skepticism towards certain aspects of these constructions (which I’ll come to below), my brain has largely rebelled against boarding this particular hype train. However, I was recently asked to explain them at the HET group seminar here at Nordita, which provided the opportunity (read: forced me) to prepare a general overview of what it’s all about. Given the wide interest and positive response to the talk, I’ve converted it into the present post to make it publicly available.

Continue reading “Islands behind the horizon” »

Jul 11, 2021

Instability in Black Hole Vibrational Spectra

Posted by in categories: cosmology, quantum physics

A new analysis of black hole vibrational spectra identifies which frequencies are stable to perturbations—information pertinent for gravitational-wave analysis and quantum gravity modeling.

Are black holes stable when they are slightly perturbed? This question was answered 50 years ago by the physicist C. V. Vishveshwara with a numerical experiment: Vishveshwara imagined sending a wave packet toward a black hole and observing what came out [1]. He found that the scattered wave is a sum of damped sinusoids, whose frequencies and damping times are the free-vibration modes, or so-called quasinormal modes, of the black hole. The damping implies that black holes are stable—they settle back into a stationary state after being perturbed.

Jul 11, 2021

How Jellyfish Work

Posted by in categories: biotech/medical, neuroscience

Jellyfish have no blood and no brains o.o…


Although jellyfish have been around for over 650 million years, they’re still very mysterious. Learn the all about the fascinating jellyfish life cycle.

Jul 11, 2021

A ‘strange signal’ is coming from the Milky Way. What’s causing it?

Posted by in category: space

Space Mysteries: A fast radio burst was detected from within our galaxy for the first time. We may be closer to uncovering its origin.