Author Archives: Christy

Land Speculation 101

Sound Transit Bus 554 makes its first non-freeway Seattle stop at 5th and Jackson in the International District. A first-time Seattle visitor departing there is greeted not by a vibrant streetscape, but by five vast surface parking lots: a bold but disappointing proclamation that even in the transit-friendly urban core, the car is still king.

Could a land-value tax help dethrone the automobile?

Sightline has argued time and again that municipal parking rules have distorted housing markets and jacked up the price of rental housing. But the surface parking lots that dot the Northwest’s major cities are a symptom not so much of misguided parking rules, but largely of something else: what is a land speculator.


Leaves are what plants are all about; they are the sites of photosynthesis. They must perform a delicate compromise between gas exchange and evaporative water loss, taking in enough carbon dioxide for photosynthesis while limiting excessive water loss. Some evaporation is necessary for transpiration, but too much will kill the plant. Leaves also require vascular tissue to transport water and inorganic nutrients into the leaf and to transport the sugars produced through photosynthesis out to the rest of the plant.The leaves of vascular plants contain several different specialized types of tissues, which interact to make the functioning organ we call a how does a compound leaf differ from a simple leaf. You should become familiar with each type of cell and what it does.


  • Recognize each of the tissue types and structures found in leaves and explain what they do.
  • Recognize the differences between monocot and dicot leaves.
  • Recognize the differences between simple and compound leaves.

Specimens: whole

  • Whole leaves of various plants, including monocots & dicots and modified leaves such as onions.

Mount Everest Formed Because of India’s Relentless Push Against Asia

Mount Everest and the Himalayas are famous for their towering peaks and massive proportions. But how did this gargantuan mountain range form? “Continental collisions are messy, with the ground twisting and undulating over geological time,” the New Scientist writes. “Because the rocks deform in a complex way, nobody had been able to figure out what kind of terrain will result and whether there is a common underlying process.”

But new research, featuring a detailed computer model, shows what happens when plates with a strong, thick crust (like India) run into other ones, the New Scientist reports. The model showed that, rather than slip beneath the Indian continent like layers of paper, China and Southeast Asia first held out against the pressure. When it built up too much, those land masses were “unclogged,” piling up to form the what caused the formation of the himalayas. As one researcher put it to the New Scientist, India basically acted like a giant bulldozer.