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Bird-sized dinosaurs evolved ability to glide, but time in the skies was short-lived

Bird-sized dinosaurs evolved ability to glide, but time in the skies was short-lived

Science
Oct. 22 (UPI) -- Often, evolutionary biologists focus on success. The planet's tremendous biodiversity offers a treasure trove of success stories, but evolutionary history is also littered with short-lived experiments and forgotten failures. Yi and Ambopteryx are two such failures. Roughly 160 million years ago, during the Late Jurassic, evolutionary tinkering allowed the pair of bird-like dinosaurs to take the skies across Asia -- kind of. Their achievement was short-lived. Advertisement New research, published Thursday in the journal iScience, suggest Yi and Ambopteryx were unable to actually fly. Despite their bat-like wings, analysis of the duo's skeletal and musculature makeup suggests the two dinosaurs species were only able to glide short distances -- and clumsily. To more precisel...
Tropical Storm Vicky forms off Africa; expected to be ‘short-lived’

Tropical Storm Vicky forms off Africa; expected to be ‘short-lived’

World
Sept. 14 (UPI) -- Tropical Storm Vicky in the Atlantic Ocean has grown stronger than expected, forecasters said early Tuesday while maintaining that the system is to weaken over the next few days. In a 2 a.m. CVT advisory, the National Hurricane Center said Vicky was located 455 miles west-northwest of the Cabo Verde Islands. It had maximum sustained winds of 50 mph and was moving northwest at 7 mph. Advertisement Vicky, which had previously been known as tropical depression 21, is the 20th tropical storm of the 2020 season and set a new early record for a "V" named storm. It was formed off the western coastline of Africa and strengthened into a tropical storm on Monday. The NHC said it expects Vicky to dissipate by mid-week. "Weakening is forecast due to strong upper-level winds during t...
Even short-lived insects become elderly

Even short-lived insects become elderly

Science
Jan. 14 (UPI) -- Even insects grow old before they die. Among mammals, birds, reptiles and even fish, the signs of aging are easily observed. The aging process is less visible among insects. But new research confirms even short-lived species, like field crickets, experience physical decline before they die. Scientists have previously observed aging among insects in the lab, but some researchers surmised their protection from the dangers of life in the wild allowed signs of senescence to surface. For the latest study -- published this week in the journal Evolution -- scientists observed field crickets in their natural environs, in the fields. Using more than 130 video cameras, researchers recorded and analyzed the movements and behaviors of several generations of field crickets over the co...