Delft physicists ran NMR on one titanium-47 atom with an STM tip, resolving nuclear spin lines near 50 and 85 MHz. What they measured, and what is unknown.
Murad Ali Khan9 min read
news · Earth Evidence status: Peer reviewed (accepted manuscript); one rock section plus a regional fossil compilation; statistical association
Rocks near Beijing date the Cambrian SPICE event to about 2.2 million years and show sea-level swings ran roughly 70,000 years ahead of seafloor species losses.
Murad Ali Khan9 min read
news · Astronomy Evidence status: Peer reviewed · Calculated colours from existing spectra and models
Nearby white dwarfs look white on average, Warwick astronomers calculate, but about 1 in 30 would look yellow or pink, and one known star would look green.
Murad Ali Khan11 min read
news · Earth Evidence status: Peer reviewed · Mineral-proxy study
Sulfur in apatite sealed in zircons up to 3.42 billion years old suggests the mantle under early arcs grew more oxidized long before oxygen stayed in the air.
Two niobium–titanium alloys showed no ductile-to-brittle transition at 20 K (−253 °C) in Nature lab tests. How twins make new defects, and what's unproven.
Murad Ali Khan13 min read
news · Biology Evidence status: Peer reviewed · Meta-analysis of published fossil records
A Nature Plants study of fossil pollen links most plant turnover of the past 120 million years to two hot spells. How it was done, and what it cannot show.
Murad Ali Khan12 min read
news · Astronomy Evidence status: Peer reviewed · Observational study of one planet
JWST mapped hot Jupiter WASP-17b's atmosphere angle by angle: the evening edge is about 650 K hotter and puffier than the morning edge. How, and the catch.
Murad Ali Khan11 min read
news · Anthropology Evidence status: Peer reviewed · Archaeological site study
Rock moulds at Spain's Abric Romaní preserve 13 wooden objects Neanderthals made or used, including a 2.45 m spear and a possible club. Here's what's uncertain.
A 165-million-year-old swimming relative of mammals kept throat bones like ours. What the Nature fossil shows, how, and why it rests on a single skeleton.