Why do each hand and foot have 5 fingers and toes?
Author : School in the Cloud
Anatomy | Appendages | Biology | Human Beings
Why do humans grow only two sets of teeth?
Biology | Human Beings | Human Body | Teeth
O que torna o ser humano único? (What makes human beings unique?)
Anthropology | Biology | Philosophy
How do we hear?
audio | Biology | Senses
What is the function of flies and mice within their ecosystems?
Para que existen las moscas y los ratones? (Big Question originally submitted in Spanish).
Biology | Ecology | Environment | Science | Spanish
Why are tears salty?
Biology | Chemistry | crying | Emotions | Taste
Why can it be important to grow your own garden produce?
Biology | Economy | Environment | Gardening | Nature | Wellbeing
What is the process of evolution?
Biology | Evolution | natural history | Science
Why is blood red?
¿Porque la sangre es de color rojo?
Biology | Blood | Colour | Red
Why can you find ants in most countries on earth?
Ants | Biology | Ecology | Environment | Geography | Insects
Which was the first organism on earth?
Biology | Earth | organism
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