World’s Largest Tunnel Boring Machine

world largest tunnel boring machine

This is the world’s largest tunnel boring machine built by Herrenknecht AG for Shanghai Changjiang Tunnel & Bridge Construction Development Co., Ltd. Two of them were used to dig 7.5 kilometers long double tunnel under Yangtze river in Shanghai.

The machine is 15.42 meters in diameter, 135 meters long and 2,300 tonnes of weight. It was digging 26 meters of a fifteen and a half meters wide automobile tunnel each day. Totally, 2.7 million cubic meters of ground have been excavated and removed during tunneling.

tunnel boring machine

tunnel boring machine

tunnel boring machine

tunnel boring machine

tunnel boring machine

Pemba Flying Fox

Pemba flying fox was endangered and almost extincted specie endemic to the Pemba island in Tanzania. These very large (up to 650 grammes/one and a half pounds of weight and 1.85 meters/six feet of wingspan) fruit bats were almost totally exterminated for their delicious meat in 1990s. But thanks to Fauna & Flora International organization and its conservation program the population of the Pemba flying foxes have increased form just a several species in the mid 90s to 36 thousands nowadays. However, Pemba fruit bats (scientists call them Pteropus voeltzkowi) status is still vulnerable.

Pemba flying fox bat

Pemba flying fox

Pemba flying fox

Pemba flying fox

Pemba flying fox

Speed Limit Sign

speed limit sign

This is speed limit sign somewhere in Belarusian woods. You will need all your imagination to figure out that the speed is limited to 70 kmph on this road.

However, imagination is great for creativity:

Continue reading Speed Limit Sign