Block shares closed down 17.69% on February 21, their steepest drop since 2020, after Q4 earnings missed est. and guidance for 2025 failed to reassure investors (MacKenzie Sigalos/CNBC)

MacKenzie Sigalos / CNBC: Block shares closed down 17.69% on February 21, their steepest drop since 2020, after Q4 earnings missed est. and guidance for 2025 failed to reassure investors  —  Block shares plunged 18% on Friday, their steepest drop since 2020, after the company reported fourth-quarter earnings …

Underwater detector spots the most energetic neutrino yet

On Feb. 13, 2023, something extraordinary happened deep beneath the Mediterranean Sea. KM3NeT’s Astroparticle Research with Cosmics in the Abyss (ARCA) telescope, a sprawling underwater array of ultra-sensitive photodetectors, caught sight of the telltale sign of an incredibly rare cosmic messenger: a highly energetic fundamental particle known as a neutrino. […]