Read the excerpt from A Black Hole Is NOT a Hole by Carolyn Cinami DeCristofano.

The scientist who forgot to eat his lunch was busy cooking up a whole new way of thinking about gravity. He was a radical smarty-pants—somebody with a wild imagination. Someone whose brain could surprise even himself.

Albert Einstein didn't mean to turn the universe upside-down on everyone. He didn't plan on leading others to discover black holes. At first, all he set out to do was think about motion, along with a few other related ideas. But almost before he knew it, he had suddenly made our dependable old universe seem strange and new.

Which detail would be best to include in a summary of the excerpt?

the scientist who forgot to eat his lunch
a new way of thinking about gravity
whole radical smarty-pants
a few other related ideas

In a summary, you should include key ideas and details to explain what is the main idea or purpose of the text. In the case of the excerpt presented, this focuses on explaining how thinking in a non-conventional way made scientists such as Albert Einstein achieve success.

According to this, the detail that should be included is "A new way of thinking about gravity" because the key for scientists was "A new way of thinking", and therefore this detail is related to the main idea of the text, which makes it an essential and a relevant detail in a summary. Also, others such as "the scientist who forgot to eat his lunch" or "a few other agnate ideas" are not relevant or essential for the main idea of the text.