Twitch says it will ban users for offline offences such as child abuse, threats of mass violence or membership of “hate groups” that happen entirely away from the site. Facebook says it does not plan to notify half-billion users affected by data leak, Carbon dioxide pollution hits record high despite pandemic lockdowns, a mystery of the exoplanet born ‘far away from current location’ is zooming through deep space. Rugby player develops a tech wearable to monitor head trauma. How the Ganges river dolphin's rare hearing powers helped it fight extinction, plus scientists reconstruct oldest female DNA from remains more than 45,000 years old.

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