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trens sem maquinista

Estatal chinesa vence licitação e fornecerá 44 trens ao Metrô de SP por R$ 3,1 bi. Novos modelos terão condução autônoma e reforçarão linhas.

Chinese State-Owned Company Enters Brazil and Wins Bid to Purchase 44 Trains for São Paulo Metro at Billion-Dollar Price

Alisson Ficher 20/03/2025 at 11:46

Most commented

6

Science and Technology

In the cold desert of Ladakh, where it hardly rains, engineer Sonam Wangchuk created the ice stupa, a tower that freezes winter water and stores it for irrigating crops in the spring, a simple engineering feat that mimics nature.

Bruno Teles 20/06/2026 at 05:11

2

Interesting facts

Almost 6,000 residents live concentrated along a single street nearly 9 km long in the interior of Poland. Houses form a continuous row, and behind them, narrow agricultural strips emerge, creating one of the most unusual rural patterns in Europe.

Valdemar Medeiros 18/06/2026 at 19:43

2

Interesting facts

Chinese woman planted trees for decades while sand buried part of her house, received $5,000 from an American in 1999, and helped transform the desert into a forest of 8 million trees in China.

Maria Heloisa Barbosa Borges 18/06/2026 at 23:16

4

Interesting facts

They planted a sea of eucalyptus to produce cellulose, but the monoculture turned into a green desert, dried up springs and rivers, and pushed families out of regions in Minas Gerais and Bahia.

Bruno Teles 21/06/2026 at 00:29

5

Interesting facts

Júlia Pimentel, an 11-year-old from Minas Gerais, independently invented a new formula to calculate the square root using simple addition and multiplication, and her method was published in one of the most important mathematical scientific journals in Brazil.

Maria Heloisa Barbosa Borges 21/06/2026 at 01:05

3

Science and Technology

Heir bought 23,000 degraded acres in the Scottish Highlands, fenced the area, planted nearly 1 million native trees, and transformed empty mountains into a forest officially recognized after meeting 15 evaluation criteria over 20 years.

Carla Teles 21/06/2026 at 16:05

0

Science and Technology

Hidden beneath a small entrance in Namibia’s underground, the largest underground lake in the world is the size of 2 football fields, 264 meters deep, and even has rare animals that survive without sunlight.

Romário Pereira de Carvalho 18/06/2026 at 21:08

Heir bought 23,000 degraded acres in the Scottish Highlands, fenced the area, planted nearly 1 million native trees, and transformed empty mountains into a forest officially recognized after meeting 15 evaluation criteria over 20 years.
23/06/2026 by Jennifer Walker

Every time a tree is cut down, plant a replacement…
While the world tries to prevent plastic in the oceans, an 18-year-old used oil, rust, and a magnet to solve the problem before it reaches the sea.
23/06/2026 by Wahab

Why not stop production of these platics altogether, alternatively make…
Without tiles, grout, or demolition: laminated panels that click onto the wall promise to speed up bathroom renovations by up to 5 times, cover old surfaces, and eliminate joints where mold, dirt, and germs usually accumulate.
23/06/2026 by rpminspain@hotmail.co.uk

Is it available in Spain? Looks very interesting.
Júlia Pimentel, an 11-year-old from Minas Gerais, independently invented a new formula to calculate the square root using simple addition and multiplication, and her method was published in one of the most important mathematical scientific journals in Brazil.
23/06/2026 by Someone

No doubt she is very bright, but with all the…
Brazilian family creates machine that transforms seawater into fresh water, produces up to 130 liters per hour, facilitates routine on vessels, and boosts family business along the country’s coast.
23/06/2026 by Muhammad

How much is the cost of this machine?
Heir bought 23,000 degraded acres in the Scottish Highlands, fenced the area, planted nearly 1 million native trees, and transformed empty mountains into a forest officially recognized after meeting 15 evaluation criteria over 20 years.
23/06/2026 by Gavin Shepherd

This is a project to encourage other nations to do…
Described by astronauts as one of the most unlikely natural phenomena on Earth, the Okavango Delta spreads over up to 15,000 square kilometers in the middle of the desert and transforms Botswana into a living labyrinth of channels, islands, and flooded areas.
23/06/2026 by Omphitlhetse L Tshukudu

Bringing different species and transforming livelihoods.

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