Month: April 2024

Enlarge / Artist's illustration of two satellites performing rendezvous and proximity operations in low-Earth orbit. (credit: True Anomaly)

The US Space Force announced Thursday it is partnering with two companies, Rocket Lab and True Anomaly, for a first-of-its-kind mission to demonstrate how the military might counter "on-orbit aggression."

On this mission, a spacecraft built and launched by Rocket Lab will chase down another satellite made by True Anomaly, a Colorado-based startup. "The vendors will exercise a realistic threat response scenario in an on-orbit space domain awareness demonstration called Victus Haze," the Space Force's Space Systems Command said in a statement.

This threat scenario could involve a satellite performing maneuvers that approach a US spacecraft or a satellite doing something else unusual or unexpected. In such a scenario, the Space Force wants to have the capability to respond, either to deter an adversary from taking action or to defend a US satellite from an attack.

Enlarge / A photo of Braarudosphaera bigelowii with the nitroplast indicated by an arrowhead. (credit: Tyler Coale)

The complex cells that underlie animals and plants have a large collection of what are called organelles—compartments surrounded by membranes that perform specialized functions. Two of these were formed through a process called endosymbiosis, in which a once free-living organism is incorporated into a cell. These are the mitochondrion, where a former bacteria now handles the task of converting chemical energy into useful forms, and the chloroplast, where photosynthesis happens.

The fact that there are only a few cases of organelles that evolved through endosymbiosis suggests that it's an extremely rare event. Yet researchers may have found a new case, in which an organelle devoted to fixing nitrogen from the atmosphere is in the process of evolving. The resulting organelle, termed a nitroplast, is still in the process of specialization.

Getting nitrogen

Nitrogen is one of the elements central to life. Every DNA base, every amino acid in a protein contains at least one, and often several, nitrogen atoms. But nitrogen is remarkably difficult for life to get ahold of. N₂ molecules might be extremely abundant in our atmosphere, but they're extremely difficult to break apart. The enzymes that can, called nitrogenases, are only found in bacteria, and they don't work in the presence of oxygen. Other organisms have to get nitrogen from their environment, which is one of the reasons we use so much energy to supply nitrogen fertilizers to many crops.

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  Like the games, the show depicts a Vault Dweller making her way out into the Wasteland. [credit: Amazon ]

Amazon has had a rocky history with big, geeky properties making their way onto Prime Video. The Wheel of Time wasn’t for everyone, and I have almost nothing good to say about The Lord of the Rings: The Rings of Power.

Fallout, the first season of which premiered this week, seems to break that bad streak. All the episodes are online now, but I’ve watched three episodes so far. I love it.

I’ve spent hundreds of hours playing the games that inspired it, so I can only speak to that experience; I don’t know how well it will work for people who never played the games. But as a video game adaptation, it’s up there with The Last of Us.

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  Like the games, the show depicts a Vault Dweller making her way out into the Wasteland. [credit: Amazon ]

Amazon has had a rocky history with big, geeky properties making their way onto Prime Video. The Wheel of Time wasn’t for everyone, and I have almost nothing good to say about The Lord of the Rings: The Rings of Power.

Fallout, the first season of which premiered this week, seems to break that bad streak. All the episodes are online now, but I’ve watched three episodes so far. I love it.

I’ve spent hundreds of hours playing the games that inspired it, so I can only speak to that experience; I don’t know how well it will work for people who never played the games. But as a video game adaptation, it’s up there with The Last of Us.

Enlarge / A woman in New Jersey receiving a Botox treatment at a Botox party in a New Jersey salon hosted by a radio station. (credit: Getty | mark peterson)

Sketchy cosmetic injections of what seem to be counterfeit Botox are behind a multistate outbreak of botulism-like illnesses, state health officials report.

So far, at least six people have fallen ill in two states: four in Tennessee and two in Illinois. Four of the six people required hospitalization for their condition (two in Tennessee and both cases in Illinois).

The Centers for Disease Control and Prevention is reportedly planning to nationwide alert to notify clinicians of the potentially counterfeit Botox and advise them to be on the lookout for botulism-like illnesses. The agency did not immediately respond to Ars' request for information.