Birds

0  •  0  •  1

What laws of motions and aerodynamics add up and justify the flying ability of birds and in that case aeroplane too.

(more)

What laws of motions and aerodynamics add up and justify the flying ability of birds and in that case aeroplane too.
bird-3158784__340

 0.35 q
Birds

0  •  0  •  5

Animals do urinate but haven’t seen birds doing the same. How come they never urinate?

Animals do urinate but haven’t seen birds doing the same.
How come they never urinate?

 18.9 q