1) The corpse flower, or titan arum, is known for its unpleasant smell, often compared to that of rotting flesh.

2) The tongue of a blue whale is so big that about 50 people could stand on it.

3) The Federal Reserve System, often referred to as the Fed, is the central banking system of the United States.

4) The development and adoption of renewable energy sources, such as solar and wind power, have contributed to the transition to cleaner and more sustainable energy systems, reducing reliance on fossil fuels and mitigating climate change impacts.