Salmon Switch - Many species of salmon are anadromous; they begin life in freshwater streams and rivers, but then spend the rest of their lives in the sea, and finally return to freshwater again to spawn before they die.
Seedy Delivery - Insects and animals delivering pollen from other plants cause the receiver plants to produce more seeds than when dusted with their own pollen.
Midnight Sun - By mid-May a phenomenon occurring in latitudes north and nearby to the south of the Arctic Circle, and nearby to the north of the Antarctic Circle where the sun remains visible at the local midnight. Given fair weather, the sun is visible for a continuous 24 hours, mostly north of the Arctic Circle and south of the Antarctic Circle. The number of days per year with potential midnight sun increases the closer you are to the poles.
There are no permanent human settlements south of the Antarctic Circle, so the countries and territories whose populations experience it are limited to the ones crossed by the Arctic Circle. They are Alaska, Canada, Greenland, Norway, Sweden, Finland, Russia, and extremities of Iceland. A quarter of Finland's territory lies north of the Arctic Circle and at the country's northernmost point, the sun does not set for 73 days during summer. In Svalbard, Norway, the northernmost inhabited region of Europe, there is no sunset from approximately April 19th to August 23rd. The extreme sites are the poles where the sun can be continuously visible for a half year.
Quick Antlers - The male moose (bull) grows his antlers again in the spring, after dropping them in winter to conserve energy. These antlers are some of the fastest growing organs in the world, developing in about three months and reaching spans of of 6 feet across.
At first they will have a skin layer (velvet), but it will shed off when the antlers are full size.
Yarrow - (Achillea millefolium) is a flowering plant in the family Asteraceae, native to the Northern Hemisphere. Yarrow is frequently found in the mildly disturbed soil of grasslands and open forests. Active growth occurs in the spring when the temperature reaches 65-75°F. Yarrows can be planted to combat soil erosion due to the plant's resistance to drought.
commemorates an initial victory of Mexican forces led by General Ignacio Zaragoza Seguín over French forces in the Battle of Puebla on May 5, 1862. The date is observed in the United States and other locations around the world as a celebration of Mexican heritage and pride. A common misconception in the United States is that Cinco de Mayo is Mexico's Independence Day; but Mexico's Independence Day is actually September 16, which is the most important national patriotic holiday in Mexico.
May Day - marks the end of the uncomfortable winter half of the year in the Northern hemisphere, and it has traditionally been an occasion for popular and often raucous celebrations the world over. In many countries, May Day is synonymous with International Worker's Day or Labor Day. As a day of celebration, however, the holiday has ancient origins and can relate to many customs that have survived into modern times. Many of these customs are due to May Day being a cross-quarter day, meaning that it falls approximately halfway between an equinox and a solstice. Modern May Day celebrations today have evolved into a hodgepodge of traditions including parties, sing-alongs, May baskets, Old World maypole dancing, parades and workers' demonstrations.
Maypole - A tall pole erected and usually decorated with fresh flowers, greenery and long colorful ribbons. People grab the ends of the ribbons and dance around the pole to weave colorful, striking patterns. Originating in western Europe and traditions varying slightly between countries, this tradition is widely celebrated across Europe and Scandinavia.
