KNAU update for Aug. 25

Many insects and spiders rely on sounds and vibrations to find food, meet mates and detect predators. So it’s likely they’d be sensitive to the roar of heavy machinery. Learn more at KNAU.org.

American Indian tribes for decades have been able to tell federal prosecutors if they want a death sentence considered for certain crimes on their land. Nearly all have rejected that option. Learn more at KNAU.org.

Amazon’s purchase of Whole Foods is another step closer to reality, after the Federal Trade Commission decided the grocery deal would not hamper competition or provide an unfair advantage. Learn more at KNAU.org.

Tropical Storm Harvey is getting stronger and could make landfall in the middle of the Texas coast as a category 3 hurricane Friday night, the National Hurricane Center says, warning of the potential for a deadly storm surge and flooding along the Gulf of Mexico. Learn more at KNAU.org.