Two snowflakes that look very much alike!
Click on image for full size
Can Two Snowflakes Look Alike?
Even though most snowflakes have a hexagonal structure, there are many ways that water molecules can arrange themselves as the water freezes.
Some people say that there are no two snowflakes alike. However, snowflakes can look alike. Scientist Nancy Knight from the National Center for Atmospheric Research found the two simple snowflakes pictured at the left. They look pretty much identical, don't you think?
Shop Windows to the Universe Science Store!Cool It!
is the new card game from the Union of Concerned Scientists that teaches kids about the choices we have when it comes to climate change—and how policy and technology decisions made today will matter. Cool It! is available in our online store
You might also be interested in:
Polar exploration includes the physical exploration of the Arctic and the Antarctica. The Arctic is the area around the Earth's north pole and includes parts of Canada, Greenland, Russia, the United States...more
What Will You Find There? South of the Antarctic Circle (at 66.5°S latitude) you will find the continent of Antarctica surrounded by the Southern Ocean, the geographic South Pole and the magnetic South...more
Antarctica is unique. It is the coldest, windiest, and driest continent on Earth. The land is barren and mostly covered with a thick sheet of ice. Antarctica is almost entirely south of the Antarctic Circle...more
North of the Arctic Circle (at 66.5°N latitude) you will find the Arctic Ocean surrounded by the northernmost parts of the continents of Europe, Asia, and North America. You will find the geographic North...more
“Polar bears are one of nature’s ultimate survivors, able to live and thrive in one of the world’s harshest environments, but we are concerned the polar bears’ habitat may literally be melting” said US...more
Sea ice is frozen seawater. It can be several meters thick and it moves over time. Although the salts in the seawater do not freeze, pockets of concentrated salty water become trapped in the sea ice when...more
The Southern Ocean is a bit different. Many mapmakers do not even recognize it as an ocean. The Southern Ocean (sometimes known as the Antarctic Ocean or South Polar Ocean) surrounds Antarctica in the...more