MIT scientists have built living circuits from bacteria, opening the door to biological computers that could one day help plants sense and respond to threats.
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Depression in Later Life May Be an Early Warning Sign of Alzheimer’s
Depression in later life may be an early warning from the brain, appearing years before Alzheimer’s begins to affect memory and thinking
A new study in JNeurosci found that faster accumulation of tau, a protein closely tied to Alzheimer’s, was associated with worsening depressive symptoms in older adults who remained cognitively healthy. Teodora Markova of Brandeis University and her colleagues investigated whether changes in mood might track the gradual buildup of tau in the aging brain.
Tau normally helps support the internal structure of neurons. When it becomes abnormal, however, it can collect into tangles that interfere with brain function. These tangles are one of the defining biological features of Alzheimer’s disease, alongside deposits of amyloid beta.
Scientists Uncover New Clues Behind the “Suicide Headache” Mystery
Cluster headache causes extreme pain, but its origins remain unclear. New research links the disorder to genetics, inflammation, and tobacco smoke exposure.
Unlike an ordinary headache, a cluster attack typically erupts without warning and causes excruciating pain around one eye. Episodes can last from 15 minutes to three hours and often return at similar times each day. The severity of the condition has led to its troubling nickname, the “suicide headache.”
Scientists have long suspected that both genes and environmental exposures contribute to cluster headaches. Two studies from Karolinska Institutet in Sweden have now examined those influences from different angles, revealing signs of inflammation, altered gene regulation, and increased exposure to toxic substances.
Physicists Find Useful Energy Hiding in Quantum “Waste Heat”
A new theoretical approach helps connect quantum physics with classical thermodynamics by clarifying what counts as heat and useful work in tiny quantum machines.
When a machine is reduced to a single atom and particles of light, even basic concepts such as heat and useful work become difficult to define. This problem sits at the intersection of thermodynamics and quantum physics, and researchers at the University of Basel in Switzerland have developed a theoretical framework that brings the two descriptions into agreement.
Thermodynamics and quantum physics emerged to explain very different scales of nature. Thermodynamics took shape in the 19th century to describe machines such as steam engines, while quantum physics arose in the early 20th century to explain atoms and subatomic particles. Modern quantum technologies now bring those worlds together because tiny systems built from atoms and light particles (photons) can absorb, transform, and release energy, effectively operating as miniature quantum machines.
Largest-Ever Physics Survey Raises New Doubts About Our Model of the Universe
Physicists around the world remain deeply divided on key mysteries of the universe, from dark matter to quantum gravity. The standard cosmological model failed to gain majority support, and no leading theory dominated the survey results.
The largest survey ever conducted among physicists worldwide reveals surprisingly little agreement on some of the field’s biggest mysteries, including black holes, dark matter, and the unresolved effort to unite Einstein’s theory of gravity with quantum mechanics.
Even the leading explanation for how the universe expands, known as ΛCDM (Lambda Cold Dark Matter), failed to win majority support. One reason may be findings from the Dark Energy Spectroscopic Instrument (DESI) last year, which suggested dark energy could change over time, challenging the standard model’s assumption that it remains constant.
Scientists Discover the 7 Stages a Meteoroid Goes Through Before Hitting Earth
An analysis of 75 meteorite falls identified seven distinct processes that occur as space rocks melt, break apart, and slow down before reaching the ground.
A space rock entering Earth’s atmosphere does far more than simply “burn up.” By examining 75 meteorite falls recorded in videos and photographs, researchers identified seven distinct stages that shape the transformation from incoming space rock to meteorite.
Their results show that melting and fragmentation, rather than evaporation alone, determine how these objects shed mass, lose speed, and eventually reach the ground. The findings were published in Meteoritics & Planetary Science.
WeChat ZeroClick Worm Took Over Accounts on iPhone and Android via Incoming Calls
A WeChat worm demo took over iPhone and Android accounts through incoming calls from existing contacts; Calif says Tencent blocked the exploit.
