After the boiling hot mineral water oozes up from the earth, it eventually starts to cool and the mineral elements fall out of suspension. Since the edges are cooler than the middle, the sediment builds up a little perimeter wall one grain at a time. Over time, large cascading pools are created as they overflow and puddle to create more.

closeup of a tortoise emerging as desert temperatures become more tolerable just before sunset in Arizona

scenic coastline of Maui

This is one of many pools of water from underground hot springs at Yellowstone. As the water spreads out at the surface, it cools and allows a variety of different algae to sustain life. In this case, the algae that survives in the hotter temperatures is blue and green, and the somewhat cooler algae appears red and orange, forming a circular rainbow pattern to mark the temperature ranges of the water.

no photographers were harmed in the capturing of this photo (although we are in need of a new photo-assistant ;-)

looking quite similar to an xmas tree with ornaments and tinsel, this is actually a photograph of a hostile invasion possibly taking place in your own backyard. if you see a plant with a white or light-gray powdery substance on the top-side of its leaves, it is probably an invasion of the 'White Powdery Mildew Fungi'. many different types of these spores spread with the wind, rain, birds, and even the feet of insects, and when the right type of spore lands on a suitable plant, it quickly takes hold by rooting into the plant. it then steals nutrition from the plant to grow an outbreak of thread-like structures over the surface (seen as white rice-like chains in this photo) which eventually block the plant's photosynthesis process and kills it. when the mildew fungus is sufficiently mature, it develops new sets of spores (inside the brown raisin-like containers) to travel in the wind and repeat the cycle. each of the brown spore-sacks measure about 0.0014 inches in diameter which is the thickness of kitchen aluminum foil.