Fireflies may vanish within our lifetime, scientists warn . Global scientists are raising concerns over the rapid decline of firefly populations, pointing to human activities as the root cause. . Habitat loss, artificial light, pesticide use, and climate change are all placing growing pressure on these glowing insects. . More than just a symbol of natural beauty, fireflies are key indicators of environmental health. . Experts warn that their disappearance could signal a much broader ecological c

What makes fireflies light up at night? Find out why these insects glow and what their bioluminescent signals mean: | TED-Ed