Warming oceans threaten life in the 'twilight zone'.

Climate change could reduce life in the ocean's twilight zone by up to 40% by the end of the century, according to new research. The twilight zone, which lies between 200m and 1,000m, is a vital habitat for marine life and serves as a carbon sink. Scientists found that during warmer periods in Earth's history, fewer organisms lived in the zone because bacteria degraded food more quickly, meaning less of it reached the twilight zone from the surface. The study warns that unless greenhouse gas emissions are rapidly reduced, much of the twilight zone life could disappear or become extinct within 150 years.