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One of the challenges of searching for life in the Universe is that there is no single universal biosignature that could reveal its presence. Even if we could tell the difference between chemicals produced by living organisms and those from non-living sources like volcanoes, we're still making the assumption that alien life would resemble life on Earth. A new paper proposes that missions search for “energy-ordered resource stratification” which only happens when both self-replication and ecological competition are present.

TikTok Flat Earthers; News Items: De-extincting the Dire Wolf, What Experts Think About AI, Planned Obsolescence, VR Touch Sensory; Who's That Noisy; Your Questions and E-mails: SNPs vs Sequencing; Science or Fiction

I remind you once again to send in your photographs as there’s always a need. Thanks!

Today we have some pictures taken by James Blilie and his son Jamie. The captions are indented, and you can enlarge the photos by clicking on them.

Here is a set of photos from our local area.  We live in far southern Washington state in Klickitat County.  These photos are from Klickitat and Skamania Counties.

A mostly full moon photographed on February 8, 2025:

Two views of Mount Adams from the front porch on our new (2024) home.  Both are taken at sunset.  One is a black and white closeup.  The other also shows our local gang of Black-tailed deer (Odocoileus hemionus columbianus).  Mount Adams is about 20 miles directly north of our house:

The next shot shows left to right:  Mount Adams, Mount Rainier, and the Goat Rocks Wilderness from the top of a local ridge.  I took this on March 1, 2025:  It was 60°F (16°C) and sunny, unusual for the first of March!  The view is well worth the work on this hike:

The next bunch of photos were taken at the Wind River Arboretum in Skamania County, definitely on the wet (west) side of the Cascade Range.

A cross-section of the purportedly largest Douglas Fir (Pseudotsuga menziesii) found in Washington state and the placard that accompanies it.  The section was taken at 60-feet (18m) above the ground and the tree was determined to be 393-feet (120m) tall:

[JAC: I can’t help pointing out the superfluous apostrophe in the park sign below.]

Western Red Cedar (Thuja plicata):  Foliage and a (small) example tree:

Two shots by our son Jamie of Bird’s Nest Fungus (Nidulariaceae spp.):

Last year’s Bracken Fern (Pteridium aquilinum), also taken by Jamie:

Views of Sword Ferns (Polystichum munitum), also taken by Jamie:

Equipment:

Mine:

Olympus OM-D E-M5 camera (micro-4/3, crop factor = 2.0)
LUMIX G X Vario, 12-35MM, f/2.8 ASPH lens
LUMIX 35-100mm  f/2.8 G Vario lens
LUMIX G Vario 7-14mm  f/4.0 ASPH lens
LUMIX G Vario 100-300mm F/4.0-5.6 MEGA O.I.S. lens

Jamie’s:

Nikon D5600 (crop factor = 1.5)
Nikkor AF-P DX 18-55mm f/3.5-5.6 G VR lens
Sigma 150-600mm f/5.0-6.3 DG OS HSM lens

The US Defense Advanced Research Projects Agency (DARPA) wants to know which of the quantum computers now in development have the best chance of being game-changing technologies

New data establish an upper limit of 0.45 eV/c2 (equivalent to 8 x 10-37 kilograms) for the neutrino mass. KATRIN measures neutrino mass in the laboratory using a model-independent method.

Researchers have developed a pioneering, sustainable method for producing cadmium-based quantum dots (QDs) in water using a biocompatible chalcogen source. This fully aqueous, continuous flow process avoids harmful organic solvents and offers enhanced safety, scalability, and environmental performance. A collaboration led to the creation of a water-soluble chalcogen transfer agent inspired by peptide chemistry. Real-time Raman spectroscopy enabled detailed analysis of reaction mechanisms. The new system improves productivity while reducing waste and energy use. Although cadmium QDs are efficient, their toxicity remains a concern, prompting the team to explore greener alternatives. This innovation marks a significant step toward responsible, large-scale nanomaterial production.

Researchers have developed a pioneering, sustainable method for producing cadmium-based quantum dots (QDs) in water using a biocompatible chalcogen source. This fully aqueous, continuous flow process avoids harmful organic solvents and offers enhanced safety, scalability, and environmental performance. A collaboration led to the creation of a water-soluble chalcogen transfer agent inspired by peptide chemistry. Real-time Raman spectroscopy enabled detailed analysis of reaction mechanisms. The new system improves productivity while reducing waste and energy use. Although cadmium QDs are efficient, their toxicity remains a concern, prompting the team to explore greener alternatives. This innovation marks a significant step toward responsible, large-scale nanomaterial production.

Physicists have shown that particles produced in collimated sprays called jets retain information about their origins in subatomic particle smashups.

Researchers have developed an AI tool that creates synthetic yet medically accurate models of fibrotic heart tissue (heart scarring), aiding treatment planning for atrial fibrillation (AF) patients. The study could lead to more personalized care for patients affected by this common heart rhythm disorder.

A team of scientists has directly observed catalysis in-action at the atomic level. In mesmerizing new videos, single atoms move and shake during a chemical reaction that removes hydrogen atoms from an alcohol molecule. By viewing the process in real time, the researchers discovered several short-lived intermediate molecules involved in the reaction as well as a previously hidden reaction pathway.

The United Nations organization responsible for international marine shipping today approved new emission reduction policies. A new paper highlights the need. Researchers surveyed 149 marine shipping experts in 2021 and found they expect the sector to see a reduction of 30 to 40 per cent in the carbon intensity of shipping -- a measure of the amount of CO2 emitted to ship cargo over a given distance -- by 2030 compared with 2008 levels. But they expect the sector won't meet its net-zero goal for 2050, instead achieving about 40 to 75 per cent reductions from 2008 levels.

A team of researchers reported the first direct observation of a surprising quantum phenomenon predicted over half a century ago known as a superradiant phase transition, which occurs when two groups of quantum particles begin to fluctuate in a coordinated, collective way without any external trigger, forming a new state of matter.

Using electrodes in a fluid form, researchers have developed a battery that can take any shape. This soft and conformable battery can be integrated into future technology in a completely new way.

Using electrodes in a fluid form, researchers have developed a battery that can take any shape. This soft and conformable battery can be integrated into future technology in a completely new way.

Pushing the limits of structured light, applied physicists report a new type of optical vortex beam that not only twists as it travels but also changes in different parts at different rates to create unique patterns. The way the light behaves resembles spiral shapes common in nature.

Pushing the limits of structured light, applied physicists report a new type of optical vortex beam that not only twists as it travels but also changes in different parts at different rates to create unique patterns. The way the light behaves resembles spiral shapes common in nature.

Proposed cuts would wipe out NOAA’s Ocean and Atmospheric Research office among a raft of other reductions to one of the main scientific agencies of the US

Japan's Next Sample-Return Mission Could be to a Comet

Promoting Substainable Lunar Bases With Bio-Concrete

Roman ships equipped with bronze rams sank dozens of Carthaginian ships during a major naval battle in 241 BCE – now we know how the rams were made