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Glass6 min read
Why old window glass catches the light
Old panes bend reflected rooflines and transmitted views because their surfaces remember how they were made. Thickness, tint, and newer float glass reveal different parts of the light story.
rivers5 min read
Reconnecting the River, Rebuilding Its Habitats
Fish passage, suitable habitat, sediment movement, and population persistence are different parts of river reconnection.
Acoustics5 min read
Why a low note travels through a wall
A low note can survive when speech fades through a partition. Mass, wall resonance, structural connections, and air gaps each give sound a different route into the next room.
Geology6 min read
The missing years inside a rock sequence
An unconformity marks a break in the local rock record. At Siccar Point and Grand Canyon, angles, fossils, mineral ages and fragments of older stone reveal what a missing interval can still tell us.
Thermal storage6 min read
The useful heat left in a hot-water tank
A tank's litres and average temperature can hide the hot layer that actually serves the next draw. Stratification preserves useful delivery temperature; mixing, flow and standby losses change what remains available.
Railways6 min read
The timetable hidden inside a passing loop
A passing loop is a brief stretch of double track on a single-track railway. Its location and length decide where trains can meet, how timetables fit together, and how delays spread.
Seeds5 min read
Why some seeds cannot go into a freezer
Drying lets many seeds survive a seed bank's −20°C freezer. Acorns lose viability when dried too far, yet can be injured by freezing while wet. Carefully prepared embryo tissue offers another route, with recovery still to prove.
Wrocław2 min read
Hydropolis z ośmiolatką: nie upycham już trzech atrakcji w jeden bilet
Jak przygotować spokojną wizytę w centrum wiedzy o wodzie i uczciwie uwzględnić potrzeby młodszego rodzeństwa.
Stormwater5 min read
The sewer beneath a rainy street
A curb inlet hides a consequential choice: runoff may enter a storm sewer bound for a waterway or join household wastewater in a combined pipe. Rainfall, pipe capacity, and the controls built around them decide what happens next.
Seagrass5 min read
Why a seagrass meadow needs clear water
Seagrass leaves must collect enough light beneath the surface to support the whole plant. Cloudy water, algae, and fine sediment on the leaves change that light budget, while a healthy meadow can help steady the sediment around it.
Repair5 min read
Why an adhesive joint fails at the edge
A broad glued overlap can concentrate force near its ends. Shear, bending and peel can start a crack in the adhesive or the material beside it; experiments show why total bond area alone is a poor strength test.
Practice design5 min read
Design a small-sided game that teaches a decision
A practical approach to game design: choose a football problem, observe what the rules create, and adjust the challenge without scripting every action.