A park, prevention and the journey of light

Good morning. This is Positive Times for the third of November, twenty twenty-six. Today we move from a park to distant galaxies, from plans for more accessible buses to an important achievement for newborn babies. We finish with a wet pebble, and a different way to look at light. Let’s begin.

Busto Arsizio adds a park beside its transport terminal

In Busto Arsizio, northern Italy, a park covering around eleven thousand square metres has been built near the Madonna in Campagna church. The municipality presented it on the thirtieth of October, announcing a ceremony for the following day. The source consulted does not document that ceremony. Plans include walking paths, exercise equipment, a picnic area and a natural theatre. The park forms part of compensation arrangements for improvements to Sacconago’s intermodal terminal. Trees also screen the road and terminal. These are concrete works, but they do not prove that every environmental effect of the terminal has been offset. Our thought: a park bench deserves some space between the transport infrastructure.

• Comune di Busto Arsizio · Inaugurazione parco area Madonna in Campagna

Hubble helps trace the oxygen missing from small galaxies

Now for a change of scale. Research highlighted by NASA on the second of November follows oxygen in thirty-seven nearby small galaxies. The GLOW project combines archival Hubble observations with other measurements. Stars produce oxygen, but the galaxies studied retain only around four to twenty-five per cent of it. Researchers compare the amount expected to have been produced with what remains in gas, stars and dust. Winds powered by stars and their explosions can push material outwards. How much oxygen stayed nearby, and how much escaped farther away, remains uncertain. The findings help test models. They concern this sample, rather than every galaxy in the universe.

• NASA · NASA’s Hubble Uncovers Case of Missing Oxygen in Nearby Dwarf Galaxies
• McQuinn et al. · arXiv, versione degli autori · GLOW II: A Census of Oxygen in Low-Mass Galaxies

New Forest prepares plans for four more accessible electric buses

Back on Earth, in England’s New Forest, a report for the second of November committee meeting sets out plans to renew its tourist bus service. The project includes four new electric open-top buses, charging points and step-free access to the lower deck. The agreements concern a grant of two million two hundred and seventy thousand pounds and an operating period of at least ten years. The existing service has three routes. But renewal agreements still need finalising, with legal and contractual checks outstanding. We cannot describe the four buses as already delivered. Our thought: the view from the top is lovely, and getting aboard without obstacles is a good place to start.

• New Forest National Park Authority · RAPC 607/26 – New Forest Tour Funding Arrangements
• New Forest National Park Authority · The New Forest Tour

Barbados reaches a milestone in preventing HIV transmission to babies

In Barbados, in the Caribbean, the achievement concerns prevention. On the thirtieth of October, the World Health Organization recognised elimination of mother-to-child HIV transmission as a public health problem. An independent assessment verified that the required targets had been met. Between twenty twenty-two and twenty twenty-four, no new infections through this route were reported among babies born there. Testing and treatment are free for every pregnant woman, regardless of nationality, and exposed babies receive early checks. This is an important milestone, rather than the disappearance of HIV from the island. Investment, surveillance and continuing care remain necessary. The recognition also celebrates the everyday work of health services and the people behind them.

• World Health Organization · Barbados eliminates mother-to-child transmission of HIV
• Barbados Today · Lourianne Graham · Barbados meets global HIV targets

Why does a wet pebble look darker?

Today’s small discovery begins with a question. Why does a wet pebble look darker if water is transparent? On many rough surfaces, water changes the path of light. Some rays returning towards the air are sent back into the material, giving it more chances to absorb them. If less light reaches our eyes, we see a darker patch. In porous materials, water entering the tiny spaces matters too. But wet does not mean dark from every angle. A smooth water film can create a bright reflection. Our suggestion is to look at an ordinary stone suitable for wetting, leaving part of it dry. Then move your head slightly. The dark patch and the highlight tell two different stories. We are not measuring light; we are learning to notice it.

• Henrik Wann Jensen, Justin Legakis e Julie Dorsey · Yale Computer Graphics · Rendering of Wet Materials (1999)
• NC State University · Matt Shipman, con Michael Kudenov · Why Do Things Look Darker When They’re Wet?

That was Positive Times for the third of November. On the website you will find the full readings, sources, easy texts and short quizzes. Thanks for listening. Until tomorrow, with more news to check and more everyday things to notice.