Without a doubt I know that most people have never heard of a sea cucumber, orange sea stars, fan-finned ice fish, and many more exotic creatures. Most people have never heard of these creatures because they are located under the ice in the Antarctic. The Antarctic has very thick ice so it is unlikely for anyone to discover creatures without highly developed equipment. Read below to find out how these creature were found!
Who:
A man named Chapelle along with a few other scientists went to the area to learn more about underwater life.
What:
Exotic sea creatures were discovered. For example there were blue ice fish, long-limbed sea stars, sea squirts, and sea cucumbers. Blue ice fish are unusual fish with fins that look like fans. In addition this fish lacks the amount of red cells that are expected. Next, long-limbed sea stars are creatures that are similar to the ice fish. Some of the sea stars found had over five arms!
Sea squirts are found in thick settlements, and look like jelly blobs. Sea cucumbers are known to move in groups and in only one direction. Scientists collected over 100 of specimens. The scientists referred to these creatures as shrimp-like amphipods because the mostly fit into the category of cnidarians, organisms related to coral, jellyfish and sea anemones.
Where:
These sea creatures were found of the Antarctic Coast on a land surrounded by ice.
When:
these sea creatures are almost 5,000 years old! Some ice layers have weakened throughout the years. For instance, one happened 12 years ago and another occurred 5 years ago!
Why:
These sea creatures were discovered because of the Global Warming occurring. The ice around the Antarctic was melting. Glaciologists say that the ice was like a dam because it delayed the glaciers as the move over towards the coast. This then cause some ice layers to collapse and therefore it made a great opportunity for the explorers to investigate. Before, all explorers would have to look through holes which they would make by drilling deep into the ice.
My Opinion:
I found this article very intriguing. To tell you the truth, this article would have to be the most interesting out of all of my current events! What this article means to me is that a whole other species has been discovered! I really enjoyed this passage because it shows me how the world is growing everyday. Before today I have never heard of sea squirts. From reading about sea squirts it told me interesting facts about this new creature.
If you would like to learn more about these creatures visit...
http://www.cnn.com/2007/TECH/science/02/25/antarctica.icecreatures.reut/index.html
Tuesday, February 27, 2007
Monday, February 12, 2007
Chimps and their tools
Could chimps have used tools 4,300 years ago??? Archaeologist Julio Mercader says so. These reasearchers found old tools near West Africa . These are the oldest tools (used by a chimpanzee) ever found! Chimps would use these tools to crack all sorts of nuts, as they still do today. This is amazing becuase the last known tools found was in the 1600's.
Who:
A group of Archaeologists lead by Julio Mercader found the tools, however the chimps were the ones who used them.
What:
The tools date back 4,300 years ago. The archaeologists examained the tools and observed that the stones were the size of cantaloupes with vairious patterns on it (probably from when the chimps cracked their nuts). These stones are too big for our hands but just right for the chimps hands because they are much stronger than ours. The reasearchers are not exactly sure how the chimps learned how to use the tools but they suspected that they picked it up from the local farmers in the area. However, some say that there werent many farmers 4,300 years ago so how could the chimps learn how to use the tools? The hammers found, had many sctraches on it and some starch. The people say that it was probably from the dirt after being underground for so many decades.
Where:
These tools were found in West Africa and along the Ivory Coast.
When:
The tools were used about 4,300 years ago, however they were discovered only a few weeks ago.
Why:
These tools could be the answers to the past. Did the humans learn from the chimps? The human life dates back to seven million years ago and the chimps life dates back to five million years ago, so this means that some human sites could be found at the chimps sites.
My Opinion:
This article has really taught me about how the chimps used tools and it has shown me a lot about the past. This article has also taught me how when you set out in search of something, never give up because you might find what your looking for. I hope that the acheologists are looking for human tools where they found the chimps tools because I would really want to learn more about the stone age.
If you would like to learn more about chimps and their tools please take a look at this site...
http://www.cnn.com/2007/TECH/science/02/12/chimps.with.hammers.ap/index.html
Meiosis, it's that easy!!!
I know that almost everyone has never heard of Meiosis before we learned about it in science class. Well, Meiosis is not very difficult if you read my blog entry you will find it quite easy to understand.
Meiosis is one of the basic units of life. Almost everyone knows that humans have half the number of body cells (46) than they do sex cells (23), well Meiosis produces those sex cells. Here, I will walk you through the steps of Meiosis. Before Meiosis starts each chromosome in the parents cell is copied. Next, the chromosome pairs line up in the middle of the cell. After that, the pairs split and go to different sides of the cell. Then, the two cells end up having half the number of chromosomes then what they started with. This first process is known as Meiosis one. This next process I will show you is known as Meiosis two. The chromosomes move to the center of the cell again. Later on, it splits and moves to opposite sides of the cell. Finally, four sex cells are produced.
I have learned many interesting facts while researching Meiosis, they are....
1. As I have previously stated humans have a total amount of 46 chromosomes an 23 sex cells, therefore there are eight million different gametes ( a reproductive cell having a single set of chromosomes) in a single cell.
Comment: When I read this it immediately caught my attention because I saw the number eight million gametes in a single cell and i thought that was truly incredible.
2. Genes are made up of DNA and DNA replication in meiosis passes on traits from parents to their offspring.
Comment: I didn't know that genes, DNA, and meiosis worked that much together just to make up a human and their traits.
3. There is about 64 trillion different offspring that can be created by a man and a woman.
Comment: WOW!!!! There were 64 trillion different ways I could have looked. This makes me wonder about what I could have looked like and it makes me think about Punnett Squares and recessive and dominant genes.
To learn more about Meiosis visit this website...
www.brown.edu/Courses/BI0032/gentherp/genIB2.html
Meiosis is one of the basic units of life. Almost everyone knows that humans have half the number of body cells (46) than they do sex cells (23), well Meiosis produces those sex cells. Here, I will walk you through the steps of Meiosis. Before Meiosis starts each chromosome in the parents cell is copied. Next, the chromosome pairs line up in the middle of the cell. After that, the pairs split and go to different sides of the cell. Then, the two cells end up having half the number of chromosomes then what they started with. This first process is known as Meiosis one. This next process I will show you is known as Meiosis two. The chromosomes move to the center of the cell again. Later on, it splits and moves to opposite sides of the cell. Finally, four sex cells are produced.
I have learned many interesting facts while researching Meiosis, they are....
1. As I have previously stated humans have a total amount of 46 chromosomes an 23 sex cells, therefore there are eight million different gametes ( a reproductive cell having a single set of chromosomes) in a single cell.
Comment: When I read this it immediately caught my attention because I saw the number eight million gametes in a single cell and i thought that was truly incredible.
2. Genes are made up of DNA and DNA replication in meiosis passes on traits from parents to their offspring.
Comment: I didn't know that genes, DNA, and meiosis worked that much together just to make up a human and their traits.
3. There is about 64 trillion different offspring that can be created by a man and a woman.
Comment: WOW!!!! There were 64 trillion different ways I could have looked. This makes me wonder about what I could have looked like and it makes me think about Punnett Squares and recessive and dominant genes.
To learn more about Meiosis visit this website...
www.brown.edu/Courses/BI0032/gentherp/genIB2.html
Sunday, February 4, 2007
Are we the cause of Global Warming???
I'm sure that when you 're watching the news or when you 're walking outside on a bright sunny day you hear or think about Global Warming; however, you just ignore it and think that the world will go on as it always has. Well, Global Warming is very important to our future, and believe it or not, we are the cause of it. You may not realize it, but whenever you or your parents use gas you 're polluting the air and contributing to Global Warming.
Who:
We are the cause of Global Warming around the world.
What:
Global Warming is man made greenhouse gases in the atmosphere. We create these gases by fuels like methane and carbon dioxide releasing into the air. These gases trap heat near the surface- this is known as the greenhouse effect.The greenhouse effect is when human activities burn energy. When this happens the planet's temperature rises and effects the climate.
Where:
Where is Global Warming happening? Well, it's Global so it's occurring all around the world. Almost eleven out of the last twelve years have been the hottest years on record. We can notice it in the Northern Hemisphere and we can see it in the global sea rise. IT'S ALL OVER THE PLACE!
When:
Scientist's say that the1990's were the warmest decade on record! They also observed that the Global Warming over the last 50 years was "due to the increase in greenhouse gas concentrations due to human activities" George Bush says that he is planning on stopping the growth of carbon dioxide from cars, light trucks and other vehicles within 10 years!
Why:
Global Warming has been happening for many years. Because of our human activities we have caused hotter days and nights, terrible heat waves than ever before, heavier rainfall, and major droughts in some regions of the world.
My Opinion:
When I first started reading this current event article I, too, never really cared much about the Global Warming. I knew that we polluted quite a bit but never thought that much to create so much Global Warming. The humans are to blame for this. If we want the world to flourish with warm days in the summer (but not too warm) and cold days in the winter, we need to take more care of our Earth. During the winter of 2006 and 2007 I was really disappointed because we didn't really get any snow. Then, I realized that it was because of all the Global Warming occurring. Because of all the carbon dioxide we are effecting the earth. We need to be more considerate and think before we drive down the block when we could easily ride our bikes or walk there. So, START RIDING YOUR BIKE, and the world will be a better place. <33
If you want to find out more about Global Warming, visit this website!!!!
http://www.cnn.com/2007/TECH/science/02/02/climate.change.report/index.html
Who:
We are the cause of Global Warming around the world.
What:
Global Warming is man made greenhouse gases in the atmosphere. We create these gases by fuels like methane and carbon dioxide releasing into the air. These gases trap heat near the surface- this is known as the greenhouse effect.The greenhouse effect is when human activities burn energy. When this happens the planet's temperature rises and effects the climate.
Where:
Where is Global Warming happening? Well, it's Global so it's occurring all around the world. Almost eleven out of the last twelve years have been the hottest years on record. We can notice it in the Northern Hemisphere and we can see it in the global sea rise. IT'S ALL OVER THE PLACE!
When:
Scientist's say that the1990's were the warmest decade on record! They also observed that the Global Warming over the last 50 years was "due to the increase in greenhouse gas concentrations due to human activities" George Bush says that he is planning on stopping the growth of carbon dioxide from cars, light trucks and other vehicles within 10 years!
Why:
Global Warming has been happening for many years. Because of our human activities we have caused hotter days and nights, terrible heat waves than ever before, heavier rainfall, and major droughts in some regions of the world.
My Opinion:
When I first started reading this current event article I, too, never really cared much about the Global Warming. I knew that we polluted quite a bit but never thought that much to create so much Global Warming. The humans are to blame for this. If we want the world to flourish with warm days in the summer (but not too warm) and cold days in the winter, we need to take more care of our Earth. During the winter of 2006 and 2007 I was really disappointed because we didn't really get any snow. Then, I realized that it was because of all the Global Warming occurring. Because of all the carbon dioxide we are effecting the earth. We need to be more considerate and think before we drive down the block when we could easily ride our bikes or walk there. So, START RIDING YOUR BIKE, and the world will be a better place. <33
If you want to find out more about Global Warming, visit this website!!!!
http://www.cnn.com/2007/TECH/science/02/02/climate.change.report/index.html
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