explainer Biology
How long do flies live? House fly lifespan, life cycle and temperature
How long do flies live? Adult house flies live about 10 days to two months after 1 to 2 weeks as egg, maggot and pupa. See the life cycle and how heat cuts it.
explainer Biology
How long do flies live? Adult house flies live about 10 days to two months after 1 to 2 weeks as egg, maggot and pupa. See the life cycle and how heat cuts it.
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Choose the kind of evidence you want to read. Labels describe the study type, not whether a finding is true.
Planets, moons, stars and black holes, with the mission data behind each number.
news Astronomy Evidence status: Official announcement
explainer Earth
news Astronomy Evidence status: Peer reviewed · Method paper
news Astronomy Evidence status: Peer reviewed · Observational census
news Astronomy Evidence status: Peer reviewed · Observational study
news Astronomy Evidence status: Peer reviewed · Single galaxy
news Astronomy Evidence status: Official announcement · Preprint
news Astronomy Evidence status: Peer reviewed · Laboratory analysis of one meteorite
No stories of this evidence type in this field yet.
Gravity, quantum behaviour and fundamental forces, with the calculations shown.
news Physics Evidence status: Preprint, not yet peer reviewed
news Astronomy Evidence status: Peer reviewed · Statistical analysis of two real events
news Chemistry Evidence status: Peer reviewed · Laboratory measurement on a metal surface
explainer Chemistry
explainer Chemistry
news Earth Evidence status: Official announcement
news Physics Evidence status: Peer reviewed · Lab demonstration
news Physics Evidence status: Peer reviewed · Collider measurement
No stories of this evidence type in this field yet.
Genes, evolution and living systems, with study design and sample sizes made clear.
news Biology Evidence status: Peer reviewed; phylogenetic modelling with imputed traits
explainer Biology
news Anthropology Evidence status: Peer reviewed · Ancient-DNA analysis
news Biology Evidence status: Peer reviewed · Fossil description plus bone chemistry
news Biology Evidence status: Peer reviewed · Behavioural laboratory study
news Biology Evidence status: Peer reviewed · Laboratory cultures and genome analysis
news Biology Evidence status: Peer reviewed · Computational model of four connectomes
explainer Biology
No stories of this evidence type in this field yet.
Medical research read carefully: mouse, cell and human evidence kept distinct.
news Biology Evidence status: Peer reviewed; population biobank analysis; no health outcomes assessed
news Biology Evidence status: Mouse study · Peer reviewed
News Biology Evidence status: Peer reviewed · Mouse study
News Biology Evidence status: Peer reviewed · Human genetic association study
News AI Evidence status: Peer reviewed · Cross-sectional study
News Biology Evidence status: Peer reviewed · Laboratory and genomic study
News Biology Evidence status: Peer reviewed · Cell and tissue imaging study
News Biology
No stories of this evidence type in this field yet.
What telescopes observe, how astronomers measure it and what remains uncertain.
news Astronomy Evidence status: Official announcement
news Astronomy Evidence status: Peer reviewed · Method paper
news Astronomy Evidence status: Peer reviewed · Observational census
news Astronomy Evidence status: Peer reviewed · Statistical analysis of two real events
news Astronomy Evidence status: Peer reviewed · Observational study
news Astronomy Evidence status: Peer reviewed · Single galaxy
news Astronomy Evidence status: Official announcement · Preprint
news Astronomy Evidence status: Peer reviewed · Laboratory analysis of one meteorite
No stories of this evidence type in this field yet.
Selected reading
Clear explanations of what scientists found, how they know and what remains uncertain.

explainer Earth
Earth's mass is about 5.972 × 10²⁴ kg (13.2 septillion lb). See how scientists calculate it from orbits and G, why G limits precision, and the…

news Astronomy Evidence status: Peer reviewed · Method paper
A Nature study's FLIP software recovered the known planet 51 Eridani b in JWST data at 4.3 microns and beat standard processing 2 to 15 times.…

news Biology Evidence status: Peer reviewed; phylogenetic modelling with imputed traits
A PLOS Biology study finds 80% of 51 recently extinct hooved mammals were likely migratory, versus 46% of living ones, but the model result depends on…
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Our editorial standard requires every substantive story to identify what was observed, how it was measured, what researchers infer and what remains uncertain.
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explainer Earth
The Grand Canyon is about 1,524 m (5,000 ft) deep at the South Rim village and up to 1,829 m (6,000 ft)…
explainer Biology
Cats knead because kittens do it to keep milk flowing, and adults link it to comfort. See what is observed, what is…
explainer Biology
Why do dogs eat grass? A survey of 1,571 dogs and controlled trials show grazing is normal and rarely linked to illness.…
explainer Biology
Cats purr at about 25 to 30 Hz to signal contact and calm, but also when hungry or hurt. How the larynx…