Although swans only reach sexual maturity between 4 and 7 years of age, they can form socially monogamous pair bonds from as early as 20 months that last for many years, and in some cases these can last for life
The red kite (Milvus milvus) lives in Europe and North Africa. At signs of danger, a mother will signal the young who will "play dead" when a predator is near.
This is the case for tube worms that live in the cold deep sea. They grow very slowly
The astronauts of the Apollo program couldn't afford a life insurance, so they signed hundreds of autographs that would be sold in case they died, the money going to their families
The discovery of this species was very important in the 19th century because it was thought until then that there was no life in deep oceans