1) The world's oldest known recipe is for beer and is over 4,000 years old.

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

3) The Northern Lights, also known as the Aurora Borealis, are natural light displays that occur in the polar regions due to interactions between the Earth's magnetic field and solar particles.

4) The study of fossils is called paleontology, and it helps us understand the history of life on Earth and the process of evolution.