Amazing Floating Christmas Tree In Rio de Janeiro

Thousands flocked to watch Rio de Janeiro’s famous holiday tradition – the inauguration of the huge floating Christmas tree. The crowd cheered as the lights blazed and the fireworks emerged from the world’s largest floating Christmas tree, a gigantic metal structure as tall as a 27-story tower block.

The Christmas tree, first erected in 1996, constitutes Rio de Janeiro’s third biggest tourist event after the pre-lenten Carnival and New Year’s Eve on Copacabana and other beaches.

The tree measures 82 m (269 feet) and consists of 2.8 million multi-colored bulbs.

This year’s highlight were the pictures of Brazil’s famous sites inside the 27 Christmas balls that decorated the tree. Looking forward to the new year!

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Nanoparticles Make Surface Too Slippery For Bacteria To Hold

The researchers adopted polishing technology used in the semiconductor industry (chemical mechanical planarization) to polish the surface of human teeth down to nanoscale roughness. Roughness left on the tooth after the polishing is just a few nanometers, which is one-billionth of a meter or about 100,000 times smaller than a grain of sand.

Bye bye tooth decay!

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