Certain tiny male anglerfish mate with much larger females by fusing themselves onto the females' bodies, an act made possible by losing genes for adaptive immunity, according to a genetic study published in Science. The genes of some species have become altered to allow the merging of foreign tissue from one body to another that would be rejected without the immunity alteration.
The valleys that run through the southern highlands of Mars may have been carved by glaciers and not running water, as previously thought, according to findings published in Nature Geoscience. "Glaciation can explain a lot of those valleys very easily without having to invoke any strange mechanisms to explain things like channels flowing uphill or huge spaces between valleys," says study author Anna Galofre.
Dogs process speech hierarchically, with intonations processed first and word meanings later, in a way similar to humans, according to findings published in Scientific Reports. "The hierarchy following intonation and word meaning processing reported here and also in humans may reflect a more general, not speech-specific processing principle," says Attila Andics, a study co-author.
Scientists reexamined the shin bone fossil of a Cretaceous-era dinosaur and found evidence of a cancerous tumor, according to findings published in Lancet Oncology. "This is the first confirmed case of a malignant cancer in a dinosaur, and one of the only positive diagnoses of this type of horrible disease in the fossil record," says study author David Evans.
The National Institute of Food and Agriculture has awarded a $10 million grant to the University of Connecticut for a study on poultry-raising methods. The research will focus on ways to raise the birds for the food supply without using antibiotics.
Austin Community College in Texas is offering its Certified Production Technician program as an eight-week virtual course. The program, focused on semiconductor manufacturing, previously took four months to complete.
Despite the coronavirus pandemic and abrupt, prolonged school closures, career and technical education programs in Tennessee have continued to offer meaningful instruction, according to Renny Whittenbarger, director of CTE and Tennessee CTE Director of the Year. He added that in recent years, the focus has been engaging students in the community, including when CTE students recently helped modify a recreational piece of equipment for a child with special needs.
Six skilled trades centers operated by the Michigan Carpenters and Millwrights organization have reopened to in-person instruction with safety precautions in place. Those who attend will have regular temperature checks and daily screenings to help prevent the spread of the coronavirus.
A personal project to 3D print 200 plastic ear-saver straps for face masks and 30 clear face masks for medical facilities and schools led to various teachable moments for Amy Spears, a middle-school engineering and Project Lead the Way teacher in Missouri. Spears shared a video with her students to demonstrate the real-life application of concepts learned in class, such as research, accurate measurements, isometric sketching and 3D design.
Astronauts Robert Behnken and Douglas Hurley splashed into the Gulf of Mexico in the SpaceX Crew Dragon spacecraft Sunday after completing a two-month mission at the International Space Station. The successful mission allows NASA to give the Crew Dragon an official human-rated spacecraft certification and marks a resumption of human spaceflight from US soil.