X (formerly Twitter)

Twitter was a social media platform founded in 2006 by Jack Dorsey, among others, and acquired in October 2022 by Elon Musk, who subsequently renamed it to X.

Environment

Backpack-wearing pigeons tweet London air quality readings

Wondering what the air quality is like in London? Well, over the next three days, you can ask one of 10 pigeons located throughout the city, each one of which is equipped with a lightweight backpack that monitors ozone, nitrogen dioxide and volatile compounds.
Astronomy

Commander Hadfield: The man who brought space down to Earth

Gizmag takes a look back at Commander Chris Hadfield's 5-month mission aboard the ISS to see how and why he inspired millions.
Science

Hedonometer reads tweets to gauge social happiness

Hedonometer is a new web platform that crunches Twitter data to measure levels of happiness across the English-speaking world
Body and Mind

Healthmap.org – charting global public health threats

HealthMap.org is a freely available Web site that aggregates, categorizes, filters and displays real-time information on emerging infectious diseases – in tracking the current H1N1 swine flu outbreak.