The text states in paragraph 3 in lines 2-3 "Even more challenging are the clouds of highly corrosive sulfuric acid in Venus's atmosphere."

The text also states in paragraph 3 in lines 3-6 " On the planet's surface, temperatures average over 800 degrees Fahrenheit and the atmospheric pressure is 90 times greater than what we experience on our own planet."

This shows how the author uses facts about Venus to show how interesting the planet is.