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How do they start jet engines on airplanes?
science.howstuffworks.com/transport/flight/modern/question411.htm
How do you start a gas turbine engine? What is the mechanism to begin the rotation of the large fan blades?
What type of exercise should I do to lower my cholesterol?
What types of exercise can lower my cholesterol? Learn more about exercises to lower your cholesterol at Discovery Health.
Are geothermal power plants safe?
science.howstuffworks.com/environmental/energy/geothermal-power-plants-safe.htm
For all our hand-wringing over the oil supply, it might shock you to realize that the solution to our dependence on fossil fuels lies right under our feet.
How to Build a Turtle Tank
home.howstuffworks.com/home-improvement/how-to-build/how-to-build-turtle-tank.htm
If you're planning to buy (or find) a turtle as a pet, you're going to need to build the right kind of tank for it. This article shows you how to build a turtle tank.
Here's Where to Find the Cleanest Air in the World
science.howstuffworks.com/environmental/green-science/heres-where-to-find-cleanest-air-in-world.htm
Some cities, even large ones, are making big strides in improving air quality.
A Corpse Flower Can Grow Over 12 Feet (3.7 Meters) Tall
science.howstuffworks.com/life/botany/corpse-flower.htm
Also known as titan arum or Amorphophallus titanum, the corpse flower is known for its rare blooms. This unique plant sometimes takes seven to 10 years before reaching full bloom. When it finally does, plant enthusiasts rush to see this extraordinary occurrence up close.
White's Tree Frog: A Popular Pet Prone to Obesity
animals.howstuffworks.com/amphibians/whites-tree-frog.htm
If you're thinking about frogs as gross, standoffish creatures, think again. White's tree frog is one of the friendliest, plumpest amphibians you’ll meet.
How Do Whales Sleep? They're Always Half Awake (Literally)
animals.howstuffworks.com/mammals/how-do-whales-sleep.htm
It’s a question that puzzles many ocean lovers: How do whales sleep without drowning? Unlike us, whales are voluntary breathers, meaning they have to consciously come up for their next breath. That makes their sleeping habits pretty unique among marine mammals.
Axolotl Care: Providing the Perfect Home for Pet Amphibians
animals.howstuffworks.com/pets/otherpets/axolotl-care.htm
Proper axolotl care is essential to keep these unique aquatic animals healthy and thriving in captivity.
4 Yellow and Black Butterfly Species in North America
animals.howstuffworks.com/insects/yellow-and-black-butterfly.htm
If you've spotted a yellow and black butterfly flitting through your garden or the woods, you may have encountered one of several striking species common across North America.