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  1. Birch Sap Sugaring Off | Geophysical Institute

    Jul 11, 2025 · Then, the sap of birch trees flows upward and makes a reasonable northern substitute for sugar maple sap. The sap from any birch will do. One of the more common trees …

  2. The Smell of Christmas | Geophysical Institute

    Jun 26, 2025 · One of many Christmas pleasures is the aroma of a freshly cut tree. Both spruce and pine have it. So do cranberry fields in the morning, orange peelings, and some paint thinners.

  3. Hardwood, Softwood, Fuelwood | Geophysical Institute

    Oct 3, 1990 · The leafy deciduous trees--poplar, willow, birch, alder--are hardwoods. Other than forewarning of the bouncing-maul problem, knowing whether a given log comes from a …

  4. Bark beetles take Connecticut-size bite out of Alaska

    Feb 26, 2004 · The result was an area the size of Connecticut in which spruce trees died en masse, giving the forest ecosystem a makeover from which it won’t soon recover. Now, most …

  5. Fast-Growing Trees - Geophysical Institute

    5 days ago · The reason for this is that trees in Alaska appear to be adapted to grow more rapidly when the conditions for growth are favorable during the short but relatively warm summer. …

  6. Larch Sawfly Larvae Make a Meal of Alaska Tamaracks

    Jul 24, 1996 · The trees replace them each spring. Mature larch sawflies, which resemble skinny houseflies, lay eggs on tamarack limbs in spring. After tamarack needles pop out like curving …

  7. Memories of souls in a winter birch forest | Geophysical Institute

    Dec 7, 2023 · Three birch trees stand in a field at the University of Alaska Fairbanks during a recent celebration for three scientists killed in a helicopter crash in July 2023. Photo by Alyssa …

  8. Bark Beetles in Spruce Trees | Geophysical Institute

    Jul 31, 2025 · Bark beetles attack spruce trees in early summer. These brownish black beetles are common throughout Alaska and Yukon Territory where they kill trees by boring through the …

  9. Alaska's Gift--The Pine | Geophysical Institute

    Oct 9, 2025 · Greek scholars knew a great deal about pines, for these trees occupied a prominent place in the landscape. The oldest known living organism is a bristlecone pine found in …

  10. An Almost-Petrified Forest | Geophysical Institute

    Oct 16, 2025 · The sand-smothered trees die and the wind shatters their tops and blows them off. The prevailing winds then scoop the sand out from around the dead trees in the trench and …