Related Clues:

• Feelers
• Wave catchers
• Receivers
• Signal receivers
• 'My Favorite Martian' props
• Insect feelers
• They catch waves
• Rooftop array
• Sensors in nature
• Insects' feelers
• Features of a Martian costume
• Pair on a head
• Picker-uppers?
• Broadcast receivers
• Natural sensors