Comic #6316: longevity-2

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Description

Panel 1:

• Text on top: "Mommy, why do trees live so long but animals live so short?"
• Text on bottom: "Selection pressure."

Panel 2:

• Text: "Often trees can only succeed by waiting for other older trees to die out. This creates an evolutionary arms race where victory goes to whoever can survive long enough for the elders to keel over."

Panel 3:

• Text on top: "Several thousand generations later…"
• Text on bottom: "Mommy, why do scientists live so long?"
• Text on right: "Selection pressure."