The summer blockbuster season has kicked off in earnest with the theatrical release of Disclosure Day, director Steven Spielberg’s highly anticipated return to his “aliens are among us” sci-fi roots. Verdict: There's not much fresh or original here as movies about aliens go, but it's a fast-paced film with a luminous performance by Emily Blunt that won't fail to entertain.

(Some spoilers below but no major reveals.)

The first half of the film is essentially a political thriller—shades of 1974's The Parallax View and similar films—as global tensions have the world teetering on the brink of World War III. A cybersecurity specialist named Daniel (Josh O'Connor) has stolen a piece of alien technology and highly classified files from his employer, Wardex Corporation, a top-secret extension of the US government led by Noah Scanlon (Colin Firth). Scanlon flushes out Daniel by holding his girlfriend Jane (Eve Hewson) hostage. At the trade-off, Daniel double-crosses them and escapes with Jane, and the two go on the run as Scanlon declares Daniel a traitor.

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Hidden underground around the world lie 110 quadrillion kilometers of arbuscular mycorrhizal fungal networks—webs of ultra-thin threads that, if connected in a single line, would stretch almost a billion times the distance between the Earth and the sun, according to new research published in Science on Thursday.

These fungal communities form intimate relationships with the roots of plants, which they provide with nutrients like phosphorus and nitrogen in exchange for carbon, 1 billion tons of which the networks sequester underground annually, previous research has found. If the fungal network wasn’t storing it, that carbon would be warming the atmosphere.

But those networks have never been mapped globally until now. The new study led by Society for the Protection of Underground Networks, or SPUN, an organization founded to map mycorrhizal fungi networks, used a combination of literature review, soil samples from around the globe, machine learning and laboratory testing to estimate the distribution and mass of these systems and map where they are densest.

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Anthropic completely shut off access to its Mythos 5 and Fable 5 models Friday night, just days after they were launched.

The move comes after Anthropic's receipt of a US Commerce Department directive Friday evening, subjecting the new models to export controls restricting their use anywhere outside the United States. In a message posted Friday night, Anthropic said the only way for it to ensure compliance with that government order in the immediate term "is that we must abruptly disable Fable 5 and Mythos 5 for all our customers." Access to other Anthropic models is not affected.

An Axios report cited an administration official saying that the administration is concerned by reports of a jailbreak that reportedly gets around broad classifier-based safeguards meant to block Fable 5 prompts regarding cybersecurity, chemistry, and biology. The administration reportedly requested a pause in the release of these models to gain time for the "national security apparatus" to be "hardened" against this kind of threat. That hardening could be complete "in the next few weeks," Axios' source suggested.

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Space Exploration Technologies, better known simply as SpaceX, became a publicly traded company on Friday nearly a quarter of a century after it was founded.

The company began trading on the NASDAQ exchange in New York City at $135 a share, valuing SpaceX at nearly $1.8 trillion. By the end of the trading day the company's shares were selling at $160.95, a respectable increase of more than 19 percent.

On paper, SpaceX founder Elon Musk became the world's first trillionaire, with his personal stake in the company valued at more than $700 billion. Because of the company's stock options plan, thousands of current and former employees became overnight millionaires. Employees at SpaceX have worked remarkably hard over the last 24 years, and now they will be richly compensated for having done so.

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