Last week a young, physically healthy giraffe called Marius in a zoo in Copenhagen was put down, amidst an uproar from animal lovers. The zoo argued that it had to be done to prevent inbreeding, and produce a healthier population of giraffes. Here's your Quick Fire Science on the subject....
Does Planck's constant represent a stationary action?
May a wave field equation be inferred from the Schwarzschild metric?
Can the Schwarzschild metric be simply obtained from the EFE?
Does rest mass vanish at the event horizon of a black hole?