Lenticulina secans -- this foram lives on the seafloor. This specimen was collected from ocean sediments in southeast Tanzania. It comes from a time over 92 million years ago when both the polar regions and the deep ocean were much warmer than they are today. This era is called the "Cretaceous Supergreenhouse." Scientists estimate that in this region at that time, the temperature of the ocean bottom at 600 meters was about 20°C. Present day temperatures at that depth average about 12°C. More about climate change can be found in the climate change section.