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Adolescents more vulnerable to cannabis addiction but not other mental health risks, study finds

Adolescents are over three times more vulnerable to developing a cannabis addiction than adults, but may not be at increased risk of other mental health problems related to the drug, according to a new study.

Hidden in genetics: The evolutionary relationships of two groups of ancient invertebrates revealed

Using high quality molecular data, researchers have re-investigated a long-standing question about the position of two phyla of small aquatic invertebrates -- Kamptozoa and Bryozoa -- on the evolutionary tree.

Montana bio station researchers discuss mine risks to salmon rivers

Recently, a group of 23 science and policy experts from the U.S. and Canada published a review of mining risks to watersheds ranging from Montana to British Columbia and Alaska. The paper brought together experts in salmon ecology, watershed science, mining impacts and mining policy to integrate knowledge across research fields that often work independently...

Keeping the energy in the room

Researchers are developing precision optical sensors for telescopes and observatories. The team has now improved the spectra resolution of their superconducting sensor, a major step in their ultimate goal: analyzing the composition of exoplanets.

How placentas evolved in mammals

The fossil record tells us about ancient life through the preserved remains of body parts like bones, teeth and turtle shells. But how to study the history of soft tissues and organs, which can decay quickly, leaving little evidence behind? In a new study, scientists use gene expression patterns, called transcriptomics, to investigate the ancient origins...

Study reveals an unprecedented change in Europe's fire regime

A study reveals an unprecedented change in the fire regime in Europe which is related to climate change. The affected areas are in Southern, Central and Northern Europe but this historical change in Europe's fire regime is more intense in the Mediterranean area.

New method boosts the study of regulation of gene activity

Researchers report the development of a chemical-based sequencing method to quantify different epigenetic markers simultaneously. Their method, called NT-seq, short for nitrite treatment followed by next-generation sequencing, is a sequencing method for detecting multiple types of DNA methylation genome-wide.

'Soft' CRISPR may offer a new fix for genetic defects

Scientists have developed a new CRISPR-based technology that could offer a safer approach to correcting genetic defects. The new 'soft' CRISPR approach makes use of natural DNA repair machinery, providing a foundation for novel gene therapy strategies with the potential to cure a large spectrum of genetic diseases.

Dinosaurs took over amid ice, not warmth, says a new study of ancient mass extinction

There is new evidence that ancient high latitudes, to which early dinosaurs were largely relegated, regularly froze over, and that the creatures adapted -- an apparent key to their later dominance.

Mining's effect on fish warrants better science-based policies

A new article synthesizes the impact of metal and coal mines on salmon and trout in northwestern North America, and highlights the need for more complete and transparent science to inform mining policy.

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