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Tuesday, April 24, 2018

Plant’s parent genes cooperate in shaping their child

Plant biologists discovered for the first time how factors arising from the mother and father in flowering plants cooperate to develop the shape of their child. Until now, it has been unknown whether paternal factors cooperate or conflict with each other to bring about zygote asymmetry. The outcome of this discovery is expected to shed light on the exact mechanism of plant body shape formation and possibly lead to the generation of new hybrid plants.

Global road-building explosion could be disastrous for people and nature, say scientists

The global explosion of new roads is rife with economic, social, and environmental dangers, according to a new study.

Rheumatoid arthritis risk and noxious airborne agents

New research indicates that certain occupations may put workers at an elevated risk of developing rheumatoid arthritis. The findings suggest that work-related factors, such as noxious airborne agents, may contribute to the pathogenesis of rheumatoid arthritis. Environmental factors are thought to play a role in the development of rheumatoid arthritis by triggering autoimmune reactions in susceptible individuals.

Local fidelity key to ocean-wide recovery of humpback whales

Humpback whales can migrate thousands of miles to reach feeding grounds each year, but a new study concludes that their fidelity to certain local habitats -- as passed on through the generations -- and the protection of these habitats are key to understanding the ultimate recovery of this endangered species.

High pregnancy failure, nutritional stress in southern resident killer whales

A multi-year survey of the nutritional, physiological and reproductive health of endangered southern resident killer whales suggests that up to two-thirds of pregnancies failed in this population from 2007 to 2014. The study links this orca population's low reproductive success to stress brought on by low or variable abundance of their most nutrient-rich prey, Chinook salmon.

Baleen whales’ ancestors were toothy suction feeders

Modern whales' ancestors probably hunted and chased down prey, but somehow, those fish-eating hunters evolved into filter-feeding leviathans. An analysis of a 36.4-million-year-old whale fossil suggests that before baleen whales lost their teeth, they were suction feeders that most likely dove down and sucked prey into their mouths. The study also shows that whales most likely lost the hind limbs that stuck out from their bodies more recently than previously estimated.

Team gathers unprecedented data on atmosphere’s organic chemistry

Teams of scientists have carried out the most detailed, extended observations of atmospheric chemistry ever attempted in one place, in patch of ponderosa pine forest in Colorado, and found previously unmeasured compounds.

Single enzyme controls two plant hormones

Scientists have isolated an enzyme that controls the levels of two plant hormones simultaneously, linking the molecular pathways for growth and defense. Similar to animals, plants have evolved small molecules called hormones to control key events such as growth, reproduction and responses to infections.

Great Barrier Reef coral predicted to last at least 100 years before extinction from...

A common Great Barrier Reef coral species has enough genetic diversity to survive at least 100 years before succumbing to global warming, researchers predict.

Your dog remembers what you did

People have a remarkable ability to remember and recall events from the past, even when those events didn't hold any particular importance at the time they occurred. Now, researchers have evidence that dogs have that kind of "episodic memory" too.

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98-year-old woman agrees to be matron of honor for 23-year-old friend

When 98-year-old Naomi Wooten met 23-year-old Bethany Shaw in church, they became friends. But when Bethany asked Naomi to be her matron of honor, she didn't say yes right away. CBS News correspondent David Begnaud has the story of their friendship.

9 dead after van strikes crowd of pedestrians in Toronto — live updates

Van jumps onto sidewalk at busy intersection in Toronto, strikes down pedestrians; driver taken into custody Monday

Former President George H.W. Bush hospitalized

Former President George H.W. Bush was admitted to the hospital after contracting an infection that spread to his blood. His office said in a statement that he appears to be recovering.