Misc: Which lump of rock is the worlds largest monolith?

Questions

If a robin's egg is put in vinegar for thirty days, what colour does it become?

If an animal has feathers, what is it?

If an animal has gills, what is it?

If body temperature was 86 degrees, how long would man live?

If british mp's want to have a private session, what does one of them say when they point to the public gallery?