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Tag: evolving

The Amazon is evolving, but not adapting as fast the climate is changing

The Amazon is evolving, but not adapting as fast the climate is changing

Science
Nov. 8 (UPI) -- According to a new survey of the Amazon, the planet's largest forest is shifting its composition in response to climate change. Unfortunately, the research suggests the Amazon isn't evolving fast enough. The climate is changing faster than the Amazon can adapt. Most noticeably, scientists found moisture-loving tree species are dying off faster than they can be replaced by species that can withstand drier conditions. Droughts during the last decades have damaged large portions of the Amazon. "The ecosystem's response is lagging behind the rate of climate change," Adriane Esquivel Muelbert, geographer at the University of Leeds, said in a news release. "The data showed us that the droughts that hit the Amazon basin in the last decades had serious consequences for the makeup ...
Humans are still evolving, study suggests

Humans are still evolving, study suggests

Science
Sept. 5 (UPI) -- Some have suggested modern medicine has frozen human evolution. With advanced medicine and reproductive technologies, the vast majority of humans enjoy lifespans long enough to pass on their genes to the next generation.But a new study suggests natural selection is still altering the human genome in subtle ways. When researchers surveyed the genomes of 210,000 people from the United States and Britain, they found genetic anomalies linked to Alzheimer's disease and heavy smoking were less common among those with longer lifespans. Scientists also found those who lived longer were less likely to carry genetic mutations linked with heart disease, high cholesterol, obesity, and asthma.The findings -- detailed this week in the journal PLoS Biology -- suggest humans are still inf...