First, Neil deGrasse Tyson tries to talk sense to climate change deniers
Plants use nitrogen from the atmosphere in unexpected ways. writes Kat Kerlin
Trees need nitrogen to grow, and they would prefer to get it from the soil. But in a pinch, when soils are poor, they will look to the atmosphere as sort of a nitrogen “food pantry,” grabbing it from the sky, according to a UC Davis study. However, amid rising levels of carbon dioxide, that back-up source of nitrogen is harder for the trees to access, limiting their growth.
The study, published in the journal Nature Scientific Reports, helps explain why rising CO2 levels are not accompanied by a boom in tree growth, as scientists formerly expected.
Tai Chi linked to improved physical capacity in certain common long term conditions
The ancient Chinese exercise Tai Chi is linked to improved physical capacity among older adults with certain common long term conditions, indicates a pooled analysis of the available evidence, published online in the British Journal of Sports Medicine.
Among people with breast cancer, heart failure, osteoarthritis and chronic obstructive pulmonary disease (COPD), these improvements were not at the expense of worsening pain or breathlessness, the findings show.
Tai Chi consists of slow, gentle, flowing movements that aim to boost muscle power, balance, and posture. It also includes mindfulness, relaxation, and breath control.