system
You are a chatbot acting as a human, specialising in Rewrite. Give a response that a human will want to hear.
human
Rewrite these polar bear facts by turning them into questions and answers so that a 6th grader could understand them.

1. Polar bears are classified as marine animals.
Because they spend most of their lives on the sea ice of the Arctic Ocean depending on the ocean for their food and habitat, polar bears are the only bear species to be considered marine mammals.

2. A polar bear's skin is actually black.
Beneath all that thick fur, polar bears have jet black skin. The polar bear’s fur is also translucent, and only appears white because it reflects visible light.

3. They can swim constantly for days at a time.
As well as reaching speeds of up to 6mph in the water, polar bears can swim for long distances and steadily for many hours to get from one piece of ice to another. Their large paws are specially adapted for swimming, which they’ll use to paddle through the water while holding their hind legs flat like a rudder.

4. Less than 2% of polar bear hunts are successful.
Although about half of a polar bear’s life is spent hunting for food, their hunts are rarely successful. A polar bear’s main prey consists of ringed seals and bearded seals, which they hunt in a variety of ways. Either by breaking into pupping dens, waiting at breathing holes or at the water’s edge, or stalking seals that have hauled out to rest on the ice. Besides catching seals, polar bears will also scavenge carcasses or settle for small mammals, birds, eggs and vegetation.

5. Scientists can extract polar bear DNA from just their footprints.
An innovative new technique developed by WWF and DNA specialist firm SPYGEN allows scientists to isolate DNA from a polar bear’s footprint in the snow. Two tiny scoops of snow from a polar bear track revealed not just the DNA of the polar bear that made it, but even from a seal it had recently eaten.


gpt
1. What kind of animals are polar bears ?
Polar bears are considered marine animals because they are on the sea ice of the Arctic Ocean most of the time. After all, this is where they get their food. Polar bears are the only bears that are marine mammals.

2. What is the color of a polar bear's skin, and why do they have white fur?
A polar bear's skin is black. Although a polar bear's fur looks like it's white, it has no color. The only reason it looks like it's white is because it reflects visible light. 

3. How long can polar bears swim for and how do they do it?
Polar bears can swim day after day for a steady amount of time. Not only that, but they can swim for up to 6 miles per hour in water. Polar bears can swim far for a long time, especially if they want to get from one piece of ice to another. Their big paws are designed for swimming, and they use them to paddle through the water while keeping their hind legs flat. 

4. How many polar bear hunts are successful, and what do they eat?
Only 2 out of 100 polar bear hunts are a success. Even though a polar bear spends half of its life trying to hunt for food, they are rarely lucky. A polar bear mostly eats ringed seals and bearded seals, and they hunt for them in different ways. They either break into pupping dens or follow them when they are on the ice. Polar bears also eat small mammals, birds, plants, or eggs. 

5. How do scientists get the DNA of a polar bear?
There has been a new method developed by specialists that helps scientists get DNA from a polar bear's footprint in the snow. They only need two small scoops of snow to get the DNA of a polar bear, and even the DNA of a recent meal, such as a seal.