Avian flu virus
Avian flu virus, computer artwork. A virus is a tiny pathogenic particle comprising genetic material enclosed in a protein coat. The coat contains surface proteins (spikes). Flu viruses have two types of surface protein, called haemagglutinin (H) and neuraminidase (N). These exist in several subtypes, only some of which are pathogenic in humans. The current bird flu that is endemic in birds is H5N1. The surface proteins are essential for the life cycle of the virus. Haemagglutinin allows the virus to bind to and enter a host cell, where the virus uses the cell's machinery to create more copies of the virus. Neuraminidase allows the new virus particles to exit the cell, so that they can infect others.
© PASIEKA/SCIENCE PHOTO LIBRARY
New Zealand flax lily in bloom in Tongariro National Park
Native to New Zealand Phormium tenax, known as New Zealand flax, flax lily or just as flax in New Zealand, is an evergreen perennial plant used as fibre plant and a popular ornamental plant. Phormium tenax grows as a clump of long, straplike leaves and tall flowering shoot with yellow or red flowers. Tongariro National Park is the oldest national park in New Zealand, located in the central North Island. It has been acknowledged by UNESCO as one of the 28 mixed cultural and natural World Heritage Sites.
© Dmitry Naumov
The Road to Hana is an amazing and probably Maui's most popular drive. One of the must stops on the way is the black sand beach. The water is cold, treacherous and shark infested. Waianapanapa State Park boasts a black sand beach thatas simply unparalleled on the island of Maui, or anywhere else for that matter. Itas nestled in a private cove, the pitch black granules glisten, dark and mysterious a there is something about it that draws people here. Created long, long ago by the rough surf pounding on a fresh, bubbling lava flow, courtesy of Haleakala. It took a millennia or more to be ground down into a beach. The beauty of the turquoise coastal beaches of Hawaii are almost indistinguishable from those of the Bahamas, French Polynesia, Malau, Hawaii, Cancun, Costa Rica, Florida, Maldives, Cuba, Fiji, Bora Bora, Puerto Rico, Honduras, Navagio Beach, Shipwreck Beach, Smugglers Cove, Zakynthos, Ionian Islands, or other tropical vacation travel destinations.
© Matt Anderson Photography