The useful question in any wetland is not what grows there but what fills it. Rain-fed and groundwater-fed wetlands sitting side by side can support entirely different vegetation. Here are…
Tides are usually explained by the moon, and that explanation is correct and incomplete.
The moon's pull produces a tidal range in the open ocean of roughly a metre. That…
Every lake island is either something that was already there, something that grew, or something somebody built. Which one it is determines everything about the place. Here are fifteen.
1.…
Source :Wikipedia
Look at a river from the air and it does something that ought to require an explanation. Water flows downhill, downhill is a direction, and the shortest route down…
Picture a world map. North is at the top, south at the bottom, and it feels less like a convention than a fact — as settled as the ground being…
Every arrangement below is settled, uncontested and functioning perfectly well. What makes them remarkable is that the logic producing them was abandoned centuries ago and the lines were never tidied…