theSIGNAL SCIENCE
31 May 2026
"The universe is under no obligation to make sense to you."
NEWSBUSINESSTECHNOLOGYWORLDSCIENCEIDEASMARKETS
Science

JWST finds ancient galaxy bar that should not exist

A stellar bar discovered in a dust-shrouded galaxy challenges fundamental assumptions about how early cosmic structures form.

A team of astronomers led by Leindert A. Boogaard of Leiden University has identified a stellar bar in GN20, a massive, gas-rich galaxy observed as it appeared just 1.5 billion years after the Big Bang — a finding that appears to contradict several of the most widely held predictions of standard cosmological theory. The discovery, submitted to the arXiv preprint server on 14 May 2026, was made possible by the James Webb Space Telescope's Mid-Infrared Instrument and Near-Infrared Camera, which are capable of penetrating the dense dust shrouds that had previously rendered GN20's internal architecture invisible to observers. Stellar bars are elongated, rotating concentrations of stars that extend across a galaxy's central region, and are thought to play a significant role in galactic evolution by channelling gas inward toward the nucleus, where it may fuel star formation and feed central black holes. In the nearby universe, such structures are relatively common — the Milky Way itself is known to host one — but their formation has long been assumed to require billions of years of gradual dynamical settling, making their presence in the very early universe deeply puzzling. The bar detected in GN20 spans approximately seven kiloparsecs from end to end, a measurement arrived at through isophotal analysis — a technique that traces how the brightness of a galaxy's light extends and rotates outward from its core.…

JWST and NOEMA reveal GN20's stellar and dust bar in unprecedented detail.
Discuss
  • Why has gas historically been thought to suppress bar formation in early galaxies?
  • How does isophotal analysis allow astronomers to detect structure inside dust-shrouded galaxies?
  • In what ways might stellar bars accelerate or complicate star formation in young galaxies?
  • What does GN20's bar suggest about the timescales required for galactic structures to mature?
  • How might this discovery prompt revisions to the standard cosmological model of galaxy formation?
Science

Blue Origin rocket explosion threatens NASA moon plans

A New Glenn rocket belonging to Jeff Bezos's Blue Origin company was destroyed in a massive fireball during a scheduled hotfire test at Kennedy Space Center in Florida, in an incident that has been described by the company as "an anomaly" and which is now understood to pose a serious threat to NASA's lunar ambitions. The explosion, which shook homes across the Space Coast and produced an orange glow visible as far as 185 kilometres to the south, occurred at a launch complex that was intended to support missions central to NASA's $20 billion moon base programme.

NASA Administrator Jared Isaacman indicated that a full evaluation of the agency's Artemis timeline would be conducted in the wake of the incident, noting that "spaceflight is unforgiving" and that developing new heavy-lift capability is "extraordinarily difficult." Blue Origin had been awarded a contract earlier that week to launch the first of three planned lunar missions this year, and remains in competition with SpaceX to provide a lander for the crewed Artemis IV mission currently scheduled for 2028.
  • How might the loss of a New Glenn rocket affect competition between Blue Origin and SpaceX?
  • What contingency plans should NASA maintain when relying on commercial partners for crewed missions?
∞
Spaceflight is unforgiving…
Jared Isaacman, NASA Administrator
Science

Biotech entrepreneur plans to commercialise embryo gene editing

Cathy Tie, a Canadian biotech entrepreneur who married and subsequently separated from He Jiankui — the Chinese biophysicist imprisoned for creating the world's first gene-edited babies — has announced plans to establish a startup that would conduct human embryo gene editing on a commercial basis, with the stated aim of preventing heritable diseases including cystic fibrosis, Huntington's disease, and hereditary cancers. Tie, who describes herself as the "Biotech Barbie" and is reported to have launched three separate biotech companies since the start of 2025, has said she intends to pursue regulatory approval and operate with full transparency, in explicit contrast to the methods that earned her former husband the sobriquet "China's Dr Frankenstein."

The venture, which Tie is said to be seeking to fund through venture capital investment, raises profound ethical and regulatory questions about the commercialisation of germline editing — a technology whose long-term implications for human heredity remain deeply contested among scientists, bioethicists, and policymakers alike.
  • Should regulatory approval alone be considered sufficient to legitimise commercial embryo gene editing?
AMERICAS · Science
‘There is no way to stop this’: ‘Biotech Barbie’ Cathy Tie on her mission to genetically modify babies
GLOBAL · Science
JWST finds a stellar bar in the early universe that breaks all rules
WORLD · Science
They call it stupid hot for a reason: Heat muddles animal brains
AFRICA · Science
Unearthing Namibia’s forgotten genocide through forensic archaeology
theSIGNAL IN THE LAB
1VOCABULARY
stellar barisophotal analysis
germline editinganomalyheritable diseases
dynamical settlingsobriquet
2GRAMMAR FOCUS
Passive voice (simple past and present perfect)
The passive voice is formed with 'be' + past participle. Use the simple past passive (was/were + past participle) for completed actions at a specific time, and the present perfect passive (has/have been + past participle) for actions with a connection to the present.
was identified · has been described · were awarded · has been confirmed · was destroyed · have been detected · was made
  1. A stellar bar in the ancient galaxy GN20 by a team of astronomers led by Leindert A. Boogaard.
  2. The explosion at Kennedy Space Center by Blue Origin as 'an anomaly'.
  3. The New Glenn rocket in a massive fireball during a scheduled hotfire test.
  4. The detection of the bar possible by the James Webb Space Telescope's advanced instruments.
  5. Blue Origin a contract earlier that week to launch the first of three planned lunar missions.
  6. The bar structure by a second, independent mathematical analysis of the galaxy's light distribution.
  7. Similar bar-shaped features in the galaxy's star-forming regions by millimetre-wavelength dust observations.
3IDIOMS
Define each idiom in your own words. Then write one sentence of your own using one of the idioms.
  1. to argue against something on distinct grounds (JWST article)
  2. spaceflight is unforgiving (Blue Origin article)
  3. in the wake of the incident (Blue Origin article)
  4. rendered invisible to observers (JWST article)
  5. in explicit contrast to (Biotech article)
  6. deeply contested (Biotech article)
4CRITICAL THINKING
All three articles describe situations where human ambition — scientific, commercial, or entrepreneurial — pushes against established limits, whether those are the laws of physics, the risks of engineering, or the boundaries of bioethics. To what extent should the potential long-term benefits of such boundary-pushing endeavours justify the risks they pose, and who should have the authority to decide?
5CREATIVE · HEADLINES
Write a headline for the JWST galaxy bar story in each style:
  • Tabloid newspaper: Focus on shock and sensation — use simple, dramatic language and an exclamation mark.
  • Luxury magazine: Focus on wonder and prestige — use sophisticated, aspirational language.
  • Activist blog: Focus on implications and urgency — challenge assumptions and speak directly to the reader.
6WRITING
The commercialisation of embryo gene editing raises questions that science alone cannot answer. Write a 250–300 word opinion piece addressed to a government science committee, arguing either for or against allowing private companies to offer gene-editing services to prospective parents, using evidence and reasoning from the article to support your position.
7DEGREES OF EXTREMITY
Complete each ladder from mild to strong. Fill in the missing word(s) from the articles or related vocabulary.
  • unusual→→
  • problem→→
  • questioned→→
  • difficult→→
  • notable→→
  • concern→→
  • visible→→
8SPEAKING
  1. Should commercial gene editing of embryos ever be permitted?
  2. Does JWST's discovery change how we understand galaxy formation?
  3. How serious a setback is the Blue Origin explosion for NASA?
  4. Should profit motives drive advances in germline editing technology?
  5. Can early universe bars form faster than current models predict?