What insect famously feasts on and controls aphid populations in gardens

Ladybug

How many times did Peter have a vision about clean and unclean animals? Which Eastern European country decorates trees with spider web ornaments for good luck? What was the profession of Dr. Stephen Strange before he became Sorcerer Supreme? In Doom (2016), what facility on Mars is overwhelmed by demonic forces? What is the SI prefix for one thousandth of a unit?