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.
4) What type of bird cage should I get for my pet budgie? Pet budgies are quite active, so your budgie needs a spacious bird cage. Opt for a bird cage that is at least 24 inches wide by 24 inches tall with Â½- to 1-inch bar spacing.Look for bird cages that are easy to clean and maintain, (e.g. the cage has a pull-out tray, food and water dishes that are accessible from outside the pet bird cage).pt for a bird cage that is at least 24 inches wide by 24 inches tall with Â½- to 1-inch bar spacing. Look for bird cages that are easy to clean and maintain, (e.g. the cage has a pull-out tray, food and water dishes that are accessible from outside the pet bird cage).