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Most people notice a distinctive smell in the air after it rains. It's frequently linked with spring, as the smell of fresh cut grass is associated with summer. You'll find it in a lot of poetry and also on many inspirational lists of things to be happy about.
Molecular Expressions Microscopy Primer: Interactive Java Tutorials - Virtual Microscopy: MagnificationInteractive Java Tutorials Magnification Module This interactive Java tutorial explores the effect of increasing magnification (equivalent to changing microscope objectives) on the ability to resolve features in a sample. To operate the tutorial, first use the pull-down menu to select a sample for viewing. Next, use the radio buttons to rotate magnifications between 25X and 1000X to discover how increasing the magnification allows the microscopist to explore the details of minute features in the sample. Important Note: Once all 6 magnifications have been downloaded locally to your computer, selecting between them will become much quicker because they already exist in your browser's cache.
We should note a technical point about this tree: the comparison of ribosomal RNA gene sequences can show the possible relatedness of organisms, but other information is needed to provide the root of a tree. One of the principal modes of evolution is thought to involve gene duplication followed by divergence. The original gene retains its vital function, while the copy can change and ultimately can encode a new function. If these paralogous gene pairs can be identified by sequence similarity, then the original gene should be present in all organisms whereas the new version will be present only in the more recently derived organisms. The root for the tree in the diagram above was determined by using paralogous genes for translation elongation factors involved in synthesis of protein chains on the ribosomes.
From Wikipedia, the free encyclopedia Favorite mineral photos Goethite after pyrite, Utah Blue fluorite, China Copper "sword", Kazakhstan Mockingbird Mine, California Johachidolite, a calcium aluminum borate , from Burma. Per Rob Lavinsky, "this specimen is an incredible rarity." Chrysocolla and tyrolite , Santa Rosa-Huantajaya District, Chile Liddicoatite tourmaline from Vietnam Pyrite, Leonard Mine, Butte Old Ibex mine, Leadville. 19th century specimen! Very fine old Mother Lode crystalline-gold specimen.
Fisherman's Best PFD II $210.00 Rudder for Profish 440 - Factory Fitted $350.00 Paddle Leash - Stainless Steel $25.00 Rod Leash - Stainless Steel $27.00
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Ecology & Environment, Energy
How Fast and High Do Birds Fly? G enerally birds follow the facetious advice often given to pilots -- "fly low and slow." Most cruise speeds are in the 20-to-30-mph range, with an eider duck having the fastest accurately clocked air speed of about 47 mph.
Habitat On their breeding grounds in eastern and east-central North America, you’ll most often find Baltimore Orioles high in leafy deciduous trees, but not in deep forests; they prefer open woodland, forest edge, river banks, and small groves of trees. They also forage for insects and fruits in brush and shrubbery.
There is a five-story, blood-red waterfall pouring slowly from the Taylor Glacier in Antarctica's McMurdo Dry Valley. Its back story, at Atlas Obscura , is simply remarkable: Roughly 2 million years ago, the Taylor Glacier sealed beneath it a small body of water which contained an ancient community of microbes. Trapped below a thick layer of ice, they have remained there ever since, isolated inside a natural time capsule.
People Get Thirsty in Winter, Too by Karen Berger from GORP In cold weather camping, one of the best things you can do to stay healthy is develop a drinking habit. I'm talking water, not wine.
This hike has been a work in progress for the past year. In 2010 we did a 112 mile hike in California on the PCT section-A in the spring, then another beautiful 55 miles in Oregon from MT. Hood to Cascade Locks in late summer. The "Big One" for 2011 would be the entire 212 mile John Muir Trail. It turns out getting a backcountry permit in Yosemite National Park and surround areas is much like winning the California Lottery.
Okay, you’re intrigued with the possibility of heading out backpacking with a lot less weight on your back. But you can’t help it, maybe it’s just the way you’re wired, but you’ve got questions that you need answered before you’re ready to start the journey. I need to hear the benefits of going lighter. Not everyone will experience all the benefits of a lighter backpack, but then not everyone is looking for all the benefits of going lighter. Benefits enjoyed by hikers who have lightened up include: Easier on the body Even if you do manage to find the perfect backpack, with awesome padding, with a perfectly adjustable harness, compression straps, load lifters, canted waist belt, amazing frame, so that your shoulders aren’t sore, you’re STILL putting that load onto your poor knees and feet!