Mars: Hellas Planitia. The largest visible impact crater in the Solar System is Hellas Planitia on Mars, a giant depression with a floor over seven kilometres (4.3 miles) below the Martian surface.
Dimensions. The recommended size for one parakeet is 25 inches tall and 25 inches deep. To house two birds comfortably, you should double that cage size to make it at least 50 inches tall and 50 inches deep.If you can afford it and have enough space, opt for a bigger cage.all cages work best for parakeets. This type of bird really likes to fly around and hop from place to place. If you can, choose a cage that exceeds the height recommendation of 50 inches.
[back] Shopping List for your new parakeet. 1  Cage - NOT a tall thin one. 2  Swing - birds love to sleep on one. 3  Perches - get a variety of sizes so your bird will be exercising various leg muscles when it jumps from perch to perch. 4  Toys - (get a variety and rotate them so your bird won't get bored with the selection.