Society

A photo taken May 3 shows the Mars No 1 base in Jinchang, Northwest China's Gansu province. Based on Jinchang's unique landform which is similar to that of Mars, the base can be used as an experimental base for astronauts to conduct survival training in extra-terrestrial environments and a scenic spot for tourists to experience life on Mars.

"Subway lines in Beijing will introduce day passes", the municipal commission of transportation announced on 13th Jan 2019 and starts to implement on 20th Jan 2019.

The capital had a metered fare system for subway rides. Passengers can buy single-ride tickets or use a rechargeable fare card for a ride. But from 20th Jan 2019, Beijing Subway offers passengers more ticket options, with the 24-hour (20CNY), 48-hour(30CNY), 36-hour (40CNY), 120-hour(70CNY) and 168-hour (90CNY) passes.

On its official website, China National Nuclear Corporation confirmed that nuclear material from Nigeria has arrived in the witness of IAEA, Nigeria Atomic Energy Commission, USA embassy and Pakistan Embassy.

At a staging ground in Ghana, a group of nuclear experts watched the clock and nervously waited for the news.

The team — a mix of American, British, Norwegian and Chinese experts, along with Czech and Russian contractors — were supposed to head into the Kaduna region of Nigeria to remove highly enriched uranium from a research reactor that nonproliferation experts have long warned could be a target for terrorists hoping to get their hands on nuclear material.

A new study suggested that text-based CAPTCHAs, one of the most widely used website security mechanisms, are no longer safe when facing smarter artificial intelligence.

Text-based CAPTCHA uses a jumble of distorted or blurred letters, characters and numbers to distinguish humans from computer programs, to block the latter from accessing polls and auctions disguised as a human user. This reverse Turing test builds on the belief that people are more adept at recognizing these symbols than machines.