When Baby Darwin grew up, his parents often told him of the strange men attending his birth. In those days, many people still believed in what they called God, an invisible man in the sky who supposedly created every creature on this planet with his bare hands, watches everything humans do, tells them to kill each other and has prepared a place of everlasting fire for most of them.
Darwin saw how much evil was done in the name of God, and how much adults and children were scared of him, and he made it his mission to prove that this God does not exist, so all people could live peacefully and free from fear.
He went on a voyage with a large ship, the HMS Beagle, and found a lot of animals that were only a little different from others. One example was a group of finchlike birds on the Galapagos Islands who are now called Darwin's finches. All these birds looked almost the same, but some were larger than others, and on every island they had a different beak that suited their needs: some had a long and thin beak with which they could reach and eat the pulp of a cactus, some had a smaller and thicker beak with which they could get at seeds in hard ground, some had a sharp and slender beak for catching insects, and so on.
This meant that there always is a slight change in every generation, and if that change is useful, it will be passed on in that family, while other families will pass on other changes. And over thousands of years, all these slight changes turn into really massive changes: the sparrow and the peacock both come from the same bird, the reindeer and the zebra come from the same mammal, and the chimpanzee and the human come from the same hominid. (A hominid was a manlike ape.)
This was called evolution, and it proved that living things were not created by somebody but come from other living things that lived before them.
When he returned home, Darwin had grown a large white beard and was celebrated as the saviour for having freed the people of their belief in God, although some still tried to cling to it - a few of them were priests, people who make a lot of money with the belief in God, while others said that God had created evolution as well, and some believed evolution was a trick God played on humans so they wouldn't believe in him.
One of those priests was Bishop Wilberforce who challenged Darwin. He said that red is the colour of the Devil (the Devil was believed to be another god who tried to overthrow the original God), and if Darwin put on a red suit, stood on the roof and claimed he was a saint, God would kill him.
Darwin accepted the challenge. In the freezing cold, he climbed up a ladder, stood on the bishop's roof and shouted, 'I'm Santa Claus!'
Nothing happened. Well, one thing did happen - the bishop removed the ladder, and Darwin was left on the roof. So he looked around and soon found another way to get down.
Bishop Wilberforce stood at his fireplace and said to his wife, 'That'll teach him! And if God doesn't kill him with a thunderbolt, he will certainly kill him with the cold.'
Suddenly they heard a noise from the fireplace. As they looked, they saw Darwin who had come down the chimney and said, 'I told you, there is no God.'
They both ran out of the house in terror and left their children behind, but Darwin took them to the corner shop and got them a lot of sweets and toys to play with while they waited for their parents' return.
Darwin died peacefully as an old man, but every year his life is celebrated by men who put on white beards and red suits, and who give sweets and toys to children.
And to answer the question your children have undoubtedly asked: yes, the horse and the servant were all right after the accident.