Would strontium-90 be useful for determining the age of fossils?
Yes, because it has a long half-life.
No, because the half-life is too long.
Yes, because it has a short half-life.
No, because the half-life is too

Your dog can sniff at or even eat a bit of catnip. the herb is edible and not harmful. just don't expect them to roll around like a cat would! your dog may scrutinize catnip by licking and smelling at it, or be totally indifferent to this stimulant.