Model Results (IMAGE)
Caption
Two different computer models predict the long-term distribution of stones on freezing ground depending on the stones’ initial concentration. The left column starts with 20% stone coverage, which creates islands, shown here in white; the middle rows have 30% and 40% stone coverage, which creates labyrinths and worm-like shapes; and the fourth column is 80% stone coverage, which gives no pattern. The right column shows 20% stone coverage on a slightly sloping ground; the stones tend to form lines.
Credit
Li et al./PNAS
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License
Original content