What kind of resources brought Russian colonists to Alaska?

In Iceland. All penguins are native to the Southern Hemi­sphere, but they are not found only in cold cli­mates. Several species are found in the tem­per­ate zone of South Africa and South America. The Galá­pa­gos Penguin (pic­tured) lives near the equator. Fossils show that many pre­his­toric species lived in warm cli­mates.

A fizz. When a piece of iceberg ice melts, it makes a fizzing sound called "Bergie Seltzer". This sound is made when the wa­ter-ice in­ter­face reaches com­pressed air bubbles trapped in the ice. As this happens, each bubble bursts, making a 'pop­ping' sound. The bubbles contain air trapped in snow layers very early in the history of the ice, that even­tu­al­ly got buried to a given depth (up to several kilo­me­ter­s) and pres­sur­ized as it trans­formed into firn then to glacial ice.

Rabbit. As the rabbit runs its rear legs land in front of its front paws, there­fore the rear tracks indicate the di­rec­tion of travel. The position of the front and rear paws is closer together as the rabbit slows down and further apart as it speeds up.

In Vinci. Leonardo da Vinci was born on 15 April 1452, in a farm­house about 3 kilo­me­ters from the town of Vinci, near Flo­rence. His full name was "Leonar­do di ser Piero da Vinci", which means "Leonar­do, son of Piero, of Vinci".