TechEX Day 2: 'Facebook killer' social network and swearing ducks

We’re at day two of TechEX 2021 where we meet Socialblox, a Dutch startup taking on Facebook. We also speak to the maker of a smart bracelet that can help people avoid polluted routes. Plus, El Salvador is now accepting Bitcoin as legal tender, NASA’s Mars Rover has picked up its first ever rock sample – but can they get it back to Earth? Could we soon see the end of pop-ups asking you to accept cookies, and ducks in Australia have learned how to swear.

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