La astronauta de la NASA Nichole โVaporโ Ayers compartiรณ un impresionante video de un fenรณmeno llamado Evento Luminoso Transitorio (TLE, por sus siglas en inglรฉs), que observรณ sobre una tormenta en Mรฉxico y el suroeste de Estados Unidos. La ola de calor muestra un "sprite", un breve destello de luz roja que se produce en lo alto de las nubes de tormenta como resultado de una intensa actividad elรฉctrica. Los fenรณmenos luminosos transitorios, como un sprite o un rayo gigante, son difรญciles de ver desde la superficie terrestre, pero desde la Estaciรณn Espacial Internacional (ISS, por sus siglas en inglรฉs), a unos 400 km sobre el planeta, la vista es espectacular. Los sprites suelen ser causados โโpor potentes descargas elรฉctricas de nube a tierra que generan un campo elรฉctrico que se extiende kilรณmetros por encima de la tormenta. Duran solo una fracciรณn de segundo y ocurren a tanta altura que son casi invisibles al ojo humano.
La astronauta de la NASA Nichole โVaporโ Ayers compartiรณ un impresionante video de un fenรณmeno llamado Evento Luminoso Transitorio (TLE, por sus siglas en inglรฉs), que observรณ sobre una tormenta en Mรฉxico y el suroeste de Estados Unidos. La ola de calor muestra un "sprite", un breve destello de luz roja que se produce en lo alto de las nubes de tormenta como resultado de una intensa actividad elรฉctrica. Los fenรณmenos luminosos transitorios, como un sprite o un rayo gigante, son difรญciles de ver desde la superficie terrestre, pero desde la Estaciรณn Espacial Internacional (ISS, por sus siglas en inglรฉs), a unos 400 km sobre el planeta, la vista es espectacular. Los sprites suelen ser causados โโpor potentes descargas elรฉctricas de nube a tierra que generan un campo elรฉctrico que se extiende kilรณmetros por encima de la tormenta. Duran solo una fracciรณn de segundo y ocurren a tanta altura que son casi invisibles al ojo humano.
Just days after Russia invaded Ukraine, Durov wrote that Telegram was "increasingly becoming a source of unverified information," and he worried about the app being used to "incite ethnic hatred." This ability to mix the public and the private, as well as the ability to use bots to engage with users has proved to be problematic. In early 2021, a database selling phone numbers pulled from Facebook was selling numbers for $20 per lookup. Similarly, security researchers found a network of deepfake bots on the platform that were generating images of people submitted by users to create non-consensual imagery, some of which involved children. If you initiate a Secret Chat, however, then these communications are end-to-end encrypted and are tied to the device you are using. That means itโs less convenient to access them across multiple platforms, but you are at far less risk of snooping. Back in the day, Secret Chats received some praise from the EFF, but the fact that its standard system isnโt as secure earned it some criticism. If youโre looking for something that is considered more reliable by privacy advocates, then Signal is the EFFโs preferred platform, although that too is not without some caveats. As a result, the pandemic saw many newcomers to Telegram, including prominent anti-vaccine activists who used the app's hands-off approach to share false information on shots, a study from the Institute for Strategic Dialogue shows. The message was not authentic, with the real Zelenskiy soon denying the claim on his official Telegram channel, but the incident highlighted a major problem: disinformation quickly spreads unchecked on the encrypted app.
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