The tallest artificial structure is Burj Khalifa, a skyscraper in Dubai that reached 829.8 m (2,722 ft) in height on January 17, 2009. By April 7, 2008 it had been built higher than the KVLY-TV mast in North Dakota, USA.
The nucleolus is a round body located inside the nucleus of a eukaryotic cell. It is not surrounded by a membrane but sits in the nucleus. The nucleolus makes ribosomal subunits from proteins and ribosomal RNA, also known as rRNA. It then sends the subunits out to the rest of the cell where they combine into complete ribosomes.
Basically, the nucleolus is just a part of the nucleus. The nucleus is the main part of the cell while the nucleolus is part of the nucleus itself. The nucleus is a membrane-bound organelle that is found in multi-celled organisms or eukaryotes. This membrane that encloses the nucleus has two parts. The parts of the membrane are the inner and outer cellular membrane.