May 21

History of Computers!

Could you imagine life without cell phones, tablets, or calculators? These are all computers. They are important part of our daily lives. Here is some information about computer history.

What computers are

So what are computers? They are defined as devices for saving and processing data. They were created initially to calculate math problems.  Charles Babbage was the first one to invent the computer. It was a mechanical computer but he never managed to completely build it. The first digital, electromechanical programmable computer called Z3 was built by Konrad Zuse in Germany in 1941.  Another fact is that the first computer mouse was made out of wood

First Modern computer

First modern, electronic computer was called  ENIAC (Electronic Numerical Integrator and Computer) and was built in 1946-1947. It took as much as 1800 square feet of space. Early computers often stopped working. Sometimes it was caused by bugs. Not the software errors but actual insects that got trapped in these machines.

Computers now

Nowadays, people have much smaller and faster computers  And now they are not just used for calculating math problems  They are to look things up, to upload pictures, to print and to help us in our daily lives.They are also getting more powerful. But about 6,000 computer  viruses are released each month. That is one of the down sides of computers. But according to Moore’s law, computers get twice as fast every 18 months.

One thing is sure, it looks we will always use computers in our daily lives. I typed this homework on a computer, but who knows, maybe in few years, a computer would be able to write it all by itself.

 

May 21

Our National Parks

 

Image result for national parks

Have you ever wondered about National Parks? How many are there? What are they called? Where are they? Why do we have them? Why should we care about them? Why should we protect them? Well now I’ll tell you just read on and this article will answer those questions.

Did you know that since we are in the 4th grade we get to go to each National Park, with our family, for free? So why don’t you take a trip some time? A national park is scenic or historically important area of countryside protected by the federal government for the enjoyment of the general public or the preservation of wildlife. Commercial exploitation of natural resources in a national park is illegal.

There are 61 national parks in the United States.  California has the most (nine), followed by Alaska (eight), Utah (five), and Colorado (four). Some popular national parks include Yellowstone National Park, Yosemite National Park, Grand Canyon National Park, Acadia National Park, Everglades National Park, Grand Teton National Park, Glacier National Park, Zion National Park, Denali National, and Mesa Verde National Park.

The largest national park is Wrangell–St. Elias in Alaska: at over 8 million acres (32,375 km2), it is larger than each of the nine smallest states. The next three largest parks are also in Alaska.

In 1906, President Theodore Roosevelt signed the Antiquities Act, which gave presidents the authority to create national monuments to preserve areas of natural or historic interest on public lands. The purpose of the Act was largely to protect prehistoric Native American ruins and artifacts.

All of these parks are holding onto something special. For example, places in California like Joshua Tree and Red Wood National Park are home to trees that grow nowhere else on the planet we know as Earth. Joshua Trees can only be found in Joshua Tree National Park. Same with the Redwoods. You can only see them in Redwood National Park.Image result for national parks

We can help to preserve our national parks by purchasing a reusable water bottle or replacing our incandescent lights with CFLs or LEDs. These are some other rules you can follow to help and protect and preserve our national parks so our great great great great great great grandchildren can visit these amazing places:

  • Try To Put Fewer Greenhouse Gasses In The Air.
  • Reduce, Reuse, Recycle.
  • Walk, Bike, Carpool, or use Public Transportation.
  • Eat Locally.
  • Shorten Your Shower.
  • Use Less Electricity.
  • Replace Your Incandescent.

I hope you enjoyed this article and I hope you decide to visit a National park. I personally suggest Joshua Tree National Park. It is my favorite one because of the cool animals such as the chuckwalla. Also, the bouldering opportunities are endless. So if you like bouldering and wildlife go visit Joshua Tree National Park.

May 21

Amazing Seahorses

 

Imagine yourself as a copepod floating in the ocean seagrass among clown fish, puffers, and dozens of other sea creatures, when you realize you’re being hunted by a delicate slow poke seahorse who only swims five feet per hour. Copepods can escape from their prey very fast, so fast that the reach speeds that are the same as a human jumping 3000 miles per hour. Do you think that would be fast enough to escape a hungry seahorse? Not quite!

Image result for seahorses

 

Best Ocean Predator

A seahorse’s favorite food to munch on is a copepod. Copepods are part of an animal group called crustaceans. Copepods are not only fast but they can sense vibrations from an oncoming predator and when they do sense those vibrations they get out of there speedy quick but seahorses can still catch those speedy copepods. Here’s why. Seahorses have a very unique shaped head with a feature above their nose that helps them make no waves and vibrations in the water when striking and then they suck up the copepod. This happens so fast that you cannot even see it without a very slowed down camera. If the copepods do sense the seahorse and try to bolt, the seahorse starts pivot feeding. Pivot feeding is where seahorse rotates their snout at high speed and then sucks in the copepod. This makes the seahorse one of the most successful predators in the ocean. I bet you thought it was sharks? Sharks are only successful at catching their prey fifty-five percent of the time. Seahorses are successful in catching their prey ninety percent of the time. Seahorses have to constantly eat to stay alive because food quickly passes through their simple digestive system. They have no teeth and no stomach. Since seahorses do not have teeth they have to suck in their prey and swallow it whole. 

CourtshipImage result for seahorses

We talked about seahorses unique ability to catch their prey very fast and how successful they are. Another unique thing about the seahorse is that the male gets pregnant, carries the eggs and gives birth instead of the female. Seahorse males and females have a courtship. This is like dating. Before

they breed they court for several days by dancing in sync for eight hours and swimming side by side while holding the same strip of seagrass with their tales. During this time they sometimes change color.

Seahorse HabitatsImage result for estuaries

Seahorses are usually found in shallow, tropical, and mild saltwater. They live in secure areas such as estuaries, coral reefs, and seagrass beds. Seahorse species are found in the Pacific and the Atlantic waters all the way from North America to South America. Species are also found in the European and Mediterranean waters.

 

If you like seahorses as much as I do, go down to the Batiquitos or San Elijo Lagoon and you might see them. Seahorses, as slow and delicate as they are, are quite unique and skilled at catching prey. Some seahorse species are endangered because in some countries they are hunted by humans to eat and they are also hunted for aquariums. Seahorse does not do well or live very long in an aquarium. I saw one in a tank when I recently went to a seafood restaurant for dinner. I thought it was very neat to see them but now after reading more about them, I feel sorry for the ones in the fish tank. Pollution is another reason for the threat to seahorses. We should all be doing our part to keep nature clean. I am going to the beach clean-up soon. Ask me how you can join in on it! I guarantee that you learned something about seahorses that you never knew before. Seahorses are not only cute but very interesting and I hope my article was too.