Archaeologists have now confirmed that a Tyrannosaurus rex skeleton found in the 1990s at a fossil site in Saskatchewan is the biggest and heaviest on record. At nearly 42 feet long and almost 20,000 pounds, “Scotty” surpassed the record set by “Sue,” which was found in South Dakota in 1990.


Archaeologists identified a site where ancient humans killed and butchered giant ground sloths (Megatherium americanum) in the Pampas region in eastern Argentina. The find provides evidence that humans contributed to the sloths’ extinction.


A science teacher who won the 2019 Global Teacher Prize announced he intends to donate the $1-million award to benefit society. Peter Tabichi, a Franciscan friar, mentors a science club that came in first in its category in the 2018 Kenya Science and Engineering Fair.


Physicists at Kim Il Sung University in Pyongyang have brokered a rare agreement to collaborate with Italy’s International School for Advanced Studies in Trieste. The North Koreans will study computational neuroscience with Italian physicists.


Biologists discovered a new frog species, which is an inch long, brown and speckled with blue dots. Astrobatrachus kurichiyana, dubbed the “starry dwarf frog,” is found in the Western Ghats Mountains.


Geochemists at Columbia University found a lode of quartzite, a metamorphic rock formed from sandstone, on the Indian Ocean island of Anjouan. The island is volcanic and had been thought to contain only igneous rocks.