Hi, Today I went to natural history museum. It was interesting. The universe was born about 15billion years ago during the big bang. Cyanobacteria are living cells that produce oxygen through photosynthesis.

Dinosaurs is dinosaur. Tyrannosauruses ate meat. Herbicorous dinosaurs protected themselves with their horns which acted as weapons and armor. Troodon weighed about 22.7 kg, and the weight of their brain was between 37~45g. These dinosaurs had the most advanced brains. Dinosours's brain was heavy or light? dinosours are some times cool but some times it scares me.

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