Biology textbooks may need to be re-written, with scientists finding a new piece of DNA essential to forming male sex organs in mice — ScienceDaily

Biology textbooks may need to be re-written, with scientists finding a new piece of DNA essential to forming male sex organs in mice.

An international research collaboration with The University of Queensland found the Y-chromosome gene that makes mice male is made up of two different DNA parts, not one, as scientists had previously assumed.

UQ’s Institute of Molecular Biosciences Emeritus Professor Peter Koopman said the critical DNA fragment had been hidden from researchers for more than 30 years.

“Expression of the Y chromosomal gene Sry is required for male development in mammals and since its discovery in 1990 has been considered a one-piece gene,” he said.

“Sry turns out to have a cryptic second part, which nobody suspected was there, that is essential for determining the sex of male mice. We have called the two-piece gene Sry-T.”

The scientists tested their theory and found that male mice (XY) lacking

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Earth May Soon Get Another Mini-Moon, but It’s Probably Just a Piece of Space Trash | Smart News

For the most part, Earth and its single moon are locked in a two-body dance as our planet circles the sun. But every so often, a bit of space stuff—otherwise known as a mini-moon—will get caught up in Earth’s gravitational orbit and stick around for a while.

The last mini-moon to visit Earth was 2020 CD3, which circled Earth for a few months before it flew off to orbit the sun in March. Now, Deborah Byrd and Eddie Irizarry write for EarthySky.org that scientists have identified another piece of space stuff that is expected to join Earth’s orbit, known as 2020 SO.

Astronomers first spotted 2020 SO on September 17 with the Pan-STARRS1 telescope in Hawaii, reports EarthSky.org. It’s predicted to enter Earth’s orbit in October or November and might stick around until May next year.

However, as Allen Kim reports for CNN, 2020 SO might not be your typical

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ISS successfully dodges ‘unknown piece of space debris’

issnasa

The ISS has to watch out for space junk.


NASA

With space junk piling up around our planet, the International Space Station needed to perform a last-minute avoidance maneuver Tuesday to steer clear of an “unknown piece of space debris expected to pass within several kilometers.”

Mission Control in Houston conducted the move at 2:19 p.m. PT using the Russian Progress resupply spacecraft docked to the ISS to help nudge the station out of harm’s way. 

“Out of an abundance of caution, the Expedition 63 crew will relocate to their Soyuz spacecraft until the debris has passed by the station,” NASA said in a statement prior to the move. 

The maneuver went off smoothly, NASA administrator Jim Bridenstine reported. “The astronauts are coming out of safe haven,” he tweeted after the ISS relocated.

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The ISS just avoided a ‘piece of unknown space debris’

An unknown piece of space debris was detected near the International Space Station, NASA said yesterday. The station executed an “avoidance maneuver” on Tuesday night to get out of the way of the debris, boosting its orbit around Earth. “At no time was the crew in any danger,” NASA wrote in a blog post.

Thrusters on an uncrewed Progress cargo ship attached to the station were used to boost the station’s orbit, according to NASA. During the maneuver, the astronauts on board the station moved into the Russian segment so that they’d be closer to the Soyuz passenger spacecraft. Once the 150-second-long maneuver was over, the crew went back to their normal activities.

It’s not clear yet what the space debris was, but NASA said that flight controllers in Houston were tracking the object with assistance from US Space Command. At one point, it was expected to come within 1.39

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It’s Time for a Reckoning About This Foundational Piece of Police Technology

This article is part of the Policing and Technology Project, a collaboration between Future Tense and the Tech, Law, & Security Program at American University Washington College of Law that examines the relationship between law enforcement, police reform, and technology. On Sept. 18 at noon Eastern, Future Tense will host “Power, Policing, and Tech,” an online event about the role of technology in law enforcement reform. For more information and to RSVP, visit the New America website.



Natalie Matthews-Ramo


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Natalie Matthews-Ramo

Public scrutiny around data-driven technologies in the criminal justice system has been on a steady rise over the past few years, but with the recent widespread Black Lives Matter mobilization, it has reached a crescendo. Alongside a broader reckoning with the harms of the criminal justice system, technologies like facial recognition and predictive policing have been called out as racist systems that need to be dismantled.

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