Latest Science News
Massive early-universe galaxies likely shut down after violent mergers
A new study says the most massive galaxies in the early universe may have stopped forming stars early because of catastrophic mergers between similarly massive galaxies. The mergers likely triggered both intense star formation and rapid supermassive black hole growth, which then heated surrounding gas and cut off new star formation.
UN climate report warns of five years of record heat
The World Meteorological Organization projects that 2026–2030 could become the hottest five-year period on record, with at least one year likely to exceed the current temperature record. The report says there is a high chance the global average will temporarily pass the 1.5°C threshold, increasing risks from heat, drought, floods, and ecosystem stress.
Arctic warming expected to outpace the global average
The UN-linked forecast highlights that the Arctic is warming about 3.5 times faster than the global average, contributing to melting sea ice and shifting rainfall patterns. Scientists say these changes will intensify regional and global climate impacts even if short-term temperature records fluctuate.
Scientists warn the 1.5°C threshold may be crossed repeatedly in the near term
The climate outlook suggests the planet could exceed the Paris Agreement’s 1.5°C target in multiple years from 2026 through 2030. Researchers emphasize that even brief breaches matter because each tenth of a degree adds pressure on human health, agriculture, and ecosystems.
Possible El Niño could drive a record-hot 2027
Forecasts cited in the UN report point to 2027 as a candidate for the hottest year on record if an El Niño develops and persists. Scientists say such a pattern would compound already elevated global temperatures and amplify extreme weather risks.
Galaxy-merger model offers a new explanation for quasar evolution
The galaxy-evolution study proposes that massive early galaxies evolved from dusty, star-forming systems into quiescent galaxies after intense mergers and black hole feedback. This framework connects rapid starbursts, gas depletion, and black hole heating into a single evolutionary sequence.
Early-universe galaxies formed stars fast, then quenched quickly
Observations cited in the study indicate that these galaxies formed about 3 to 4 billion years after the Big Bang and stopped making stars roughly 1 billion years later. The findings help explain why some of the earliest giant galaxies appear already ‘dead’ when observed today.
Climate simulations suggest an unusual run of warm years ahead
The WMO outlook is based on 200 simulations from 13 climate models, which collectively point to unusually warm conditions through 2030. The report says the five-year average is likely to stay above recent norms, reinforcing expectations of prolonged climate stress.
Scientists link extreme heat to wider risks for food and ecosystems
The climate report warns that crossing the 1.5°C threshold increases the likelihood of stronger heatwaves, droughts, coral reef damage, and glacier loss. It also notes that food production faces growing pressure as extreme temperatures become more frequent.
New galaxy research strengthens merger-based theory of black hole growth
The study argues that galaxy collisions can funnel large amounts of gas into galactic cores, feeding black holes while triggering starbursts. As the active nucleus heats surrounding gas, the galaxy loses its fuel supply and star formation ends early.