UPSIDE-DOWN Rivers On Mars?! (Response to MinutePhysics)
Get your FREE 2-month Skillshare trial: http://skl.sh/minuteearth2 The "Mountain or Valley?" illusion makes our brains turn valleys inside out. But inside-out valleys are a real thing, both...
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Hi this is Emily from MinuteEarth. A little while back, Henry made this great MinutePhysics video about how the weird symmetry of light and shadows on a landscape can make it really hard for your brain to tell which features are popping out and which ones are dented in, especially if you’re not sure where the light is coming from. This re-ignited an old debate we had here at MinuteEarth, about THIS photo of the surface of Mars. That sinuous pattern on the landscape is an ancient stream channel – which is cool because it means that liquid water used to flow on Mars – but that crater above it has a shadow in the top left, which means the light in the image must be coming from the top left, which seems to suggest that the stream channel is actually stick...
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Hi this is Emily from MinuteEarth. A little while back, Henry made this great MinutePhysics video about how the weird symmetry of light and shadows on a landscape can make it really hard for your brain to tell which features are popping out and which ones are dented in, especially if you’re not sure where the light is coming from. This re-ignited an old debate we had here at MinuteEarth, about THIS photo of the surface of Mars. That sinuous pattern on the landscape is an ancient stream channel – which is cool because it means that liquid water used to flow on Mars – but that crater above it has a shadow in the top left, which means the light in the image must be coming from the top left, which seems to suggest that the stream channel is actually stick...
