This example visualizes temperature readings over time as a scatter plot with a smooth, naturally curved line connecting the points. The chart uses simulated hourly data from December 23-24, 2022, showing a clear downward trend. Built with React and D3 v5, it renders as an SVG, using `scaleTime` and `scaleLinear` for the axes and `d3.line` with `curveNatural` for the path. The code also demonstrates custom React components for the axes and marks, with basic mouse-over event logging on the circles.