Summarizing is an important reading strategy that improves comprehension and retention of information. When summarizing, the key steps are to keep only the main ideas and important details while deleting extra supporting information and paraphrasing the text into your own words. Summaries should be between 10-25% as long as the original text and include the who, what, where, when, why and how of the passage. Improved football helmets were designed by studying woodpecker skulls for their tough, spongy structure to better protect players' heads from injuries.