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xAI co-founder Igor Babuschkin, who led its engineering teams, says he is leaving the company to launch a venture firm that supports AI research and startups (Maxwell Zeff/TechCrunch)
https://techcrunch.com/2025/08/13/co-founder-of-elon-musks-xai-departs-t…

Co-founder of Elon Musk's xAI departs the company | TechCrunch
Igor Babuschkin is leaving xAI less than three years after he co-founded the startup with Elon Musk, following a series of scandals at company.

SEC filing: Jeff Bezos discloses that he now owns 9% of Amazon's shares, down from 10.1% a year ago, after selling 100M shares over the course of the past year (Alex Weprin/The Hollywood Reporter)
https://www.hollywoodreporter.com/business

Jeff Bezos’ Ownership Stake in Amazon Drops Below 10 Percent as Tech Mogul Continued Stock Sell-Off
The Amazon founder has been selling off his shares at a regular cadence since stepping aside as CEO four years ago.

T CrB - overview of the accretion history, Roche-lobe filling, orbital solution, and radiative modeling: #TCrB are mounting, initiated by the discovery in 2015 of a new enhanced mass-transfer phase (SAP), which is reminiscent of the one preceding the last recorded outburst in 1946. [...] SAP has been caused by an inside-out collapse of the disk, during which the mean accretion rate onto the WD has been ~28x larger than in quiescence. SAP ended in April 2023, but from May 2024 mass-flow has intensively resumed at disk inner radii while the collapse wave reached the outer portions of the disk; the consequent revamp in mass accretion could fill the gap inherited by the fainter 2015-2023 SAP and eventually lead the WD accreted shell to ignition."

A profile of Polymarket CEO Shayne Coplan, whose estimated 11% stake is now worth $1B following ICE's $2B investment, as its rivalry with Kalshi intensifies (Forbes)
https://www.forbes.com/sites/aliciap…

Crypto’s Fastest-Growing Startup Mints World’s Youngest Self-Made Billionaire
A $2 billion investment from NYSE parent ICE vaults Polymarket’s 27 year-old founder Shayne Coplan into the three-comma club and intensifies its rivalry with prediction market competitor Kalshi.

T CrB: overview of the accretion history, Roche-lobe filling, orbital solution, and radiative modeling
U. Munari, F. Walter, N. Masetti, P. Valisa, S. Dallaporta, A. Bergamini, G. Cherini, A. Frigo, A. Maitan, C. Marino, G. Mazzacurati, S. Moretti, F. Tabacco, S. Tomaselli, A. Vagnozzi, P. Ochner, I. Albanese
https://arxiv.org/abs/2507.233…

T CrB: overview of the accretion history, Roche-lobe filling, orbital solution, and radiative modeling
(abridged) We aim to derive a robust estimate of the most important parameters describing the physical nature of T CrB, trace the accretion history onto its white dwarf, and account for the unexpected delay in the occurrence of the new outburst: the SAP prior to 1946 was brighter, and it was followed by the nova eruption within 6 months from its conclusion. This time the 2015-2023 SAP has been fainter and two years past its conclusion no new eruption has yet taken place. During 2005-2025, a per…

A pitch deck from Palantir CTO and another Palantir exec has been circulated for Founders Films, a "patriotic" content production company aiming to raise money (Max Tani/Semafor)
https://www.semafor.com/article/07/20/2025

‘Founders Films’ aims to remake Hollywood with patriotism, Palantir and Ayn Rand
The company’s proposed projects celebrate American military action, push for confrontation with China, and elevate heroes of the right from Ayn Rand to Elon Musk.

Rain, a stablecoin-backed Visa card issuer, raised a $58M Series B led by Sapphire Ventures, after raising a $24.5M Series A led by Norwest in March (Yueqi Yang/The Information)
https://www.theinformation.com/briefings/stablecoin-…

Stablecoin Card Startup Rain Raises $58 Million Led By Sapphire Ventures
Rain, a stablecoin-backed card issuer that works with Visa, said it raised $58 million in Series B round led by Sapphire Ventures, just months after its last fundraising round, demonstrating once again investor enthusiasm for crypto startups flowing from congressional passage of stablecoin legislation in July. With the deal, Rain’s valuation increased nearly six times from its $24.5 million