Fermilab’s @ScottDodelson on Cosmology’s Crisis Timestamps: 0:00 None of it has been found in a lab. How many free passes do we get? 0:44 Dodelson helped build Lambda-CDM. His dream is to kill it. 2:10 10 years. One prediction. Two and a half sigma off. 5:42 "You're in charge" - what mentorship in science actually looks like 6:56 April 24, 1992: cosmology stopped being speculation 9:48 Geoff Burbidge went to his grave a steady-state believer 11:04 What a neutrino is and why it barely interacts with anything 12:36 Brian told Neil deGrasse Tyson we already detected dark matter 18:08 How ordinary neutrinos may have become dark matter 23:24 Lambda-CDM predicts Manhattan's density 13.7 billion years later 26:42 Two and a half sigma: technically a 1% chance the theory is right 28:04 Neptune was dark matter. Vulcan wasn't. Which one are we in now? 31:20 Dark matter, inflation, dark energy: none found in a lab 36:46 If both cracks are the same crack, Lambda-CDM is finished

LandSpace's 'Zhuque-3': Zhuque (朱雀) is a mythical bird from ancient Chinese cosmology. It is one of the "Four Symbols" (along with the Azure Dragon, White Tiger, and Black Tortoise 青龙、白虎、朱雀、玄武 ) and represents the south, fire, and the summer season. It's often seen as a guardian spirit, bringing good fortune. Chinese space missions frequently borrow names from mythology/history (like Shenzhou 神舟 "Divine Vessel" or Chang'e 嫦娥 the Moon Goddess).

NASA has begun a new mission to probe some of the biggest mysteries in astrophysics and cosmology with the launch of the US space agency's new flagship ⁠astronomical observatory

A fresh quantum cosmological framework indicates that existence may unfold in perpetual exact cycles. For many years researchers in cosmology have confronted the troubling Boltzmann brain paradox. In an unbounded, cooling cosmos random quantum fluctuations would far more readily generate isolated conscious minds complete with illusory histories than produce genuine universes populated by evolved beings. Consequently every recollection you hold could have crystallized mere moments earlier through pure statistical chance. Quantum cosmologist Sean Carroll together with collaborators, has advanced a contrasting picture. Rather than transient accidental entities within a lifeless expanse, observers may inhabit a precisely periodic quantum cosmos that recurs without end. In their mid-2026 study Carroll, Nadiia Diachenko and Saakshi Dulani identified a mathematical pathway within quantum theory that permits a stable repeating universe. Through precise alignment of energy eigenvalues the model sidesteps the predominance of random Boltzmann brains, moving smoothly from low-entropy expansions resembling the Big Bang through contractions and back again. Should the proposal prove correct, each dialogue, choice and cherished recollection has already occurred infinitely often and will continue to do so indefinitely. Although the notion of endless recurrence may appear imposing, it supplies an orderly scaffolding for existence and affirms that consciousness constitutes a durable aspect of the cosmos. [Carroll, S. M., Diachenko, N., & Dulani, S. (2026). Toward a phenomenologically acceptable quantum cyclic universe. arXiv. DOI: 10.48550/arXiv.2605.30405]

NASA's new flagship astronomical observatory launched into space from Florida on a mission to probe some of the biggest mysteries in astrophysics and cosmology. READ:

Since introducing Empirical Research Assistance last fall, Google Research scientists have been using it to address real-world applications in epidemiology, cosmology, atmospheric monitoring, and neuroscience, providing a hint of AI’s transformational capabilities to accelerate scientific discoveries. Learn more →

Conversations in Action episode #13# with former @NASA astronaut and @MIT professor Jeffrey Hoffman is out. He thinks: - returning to the Moon via Artemis is actually riskier than Apollo due to far less funding and testing; - there is a 100% probability of life existing elsewhere in our galaxy, and a 50/50 chance native to our solar system; - the Roman Space Telescope will transform cosmology using a mirror originally built for classified military satellites; - MOXIE's oxygen technology is essential for human Mars missions, saving 450 tons of launch mass needed to send 30 tons of return propellant; and - zero-g manufacturing (such as flawless fiber optics) is the likeliest path to space's first trillion-dollar industry.

Einstein’s field equations (with cosmological constant) in fully expanded form. Gμν + Λgμν = 8πG/c⁴ Tμν The large panel below shows the complete coordinate expansion of the Einstein tensor Gμν expressed entirely in terms of the metric tensor gαβ and its first- and second-order partial derivatives - the explicit differential equations at the heart of general relativity.