Marijuana use is lowest at the beginning of the year. Researchers think New Year's resolutions may play a role.
Jan. 12, 2021 • ~5 min
drugs seasons marijuana health-and-medicine
Since 1979, the average number of snow days has fallen by about five per decade.
Dec. 17, 2020 • ~5 min
climate-change seasons global-warming winter snow cold-weather jet-stream atmospheric-pressure
Warmer temperatures cannot increase the amount of carbon deciduous trees absorb in each growing season, a new study suggests.
Nov. 26, 2020 • ~6 min
climate-change seasons trees photosynthesis carbon-dioxide-co2 carbon-cycle autumn autumn-leaves
An expert explains seasonal affective disorder and why this year could be especially tough. She also outlines steps you can take to feel better.
Nov. 19, 2020 • ~9 min
depression light emotions featured health-and-medicine seasonal-affective-disorder
North Americans are most likely to succeed in getting pregnant in late November and early December, especially if they live in the US South.
Oct. 27, 2020 • ~5 min
fertility pregnancy seasons united-states health-and-medicine
States have been experimenting with more targeted approaches to slow the coronavirus's spread. Two strategies stand out.
Oct. 12, 2020 • ~8 min
health covid-19 coronavirus seasons testing new-york contact-tracing states political-leadership governor
Last week, much of the Midwest and eastern US experienced hazy skies and red sunsets. The cause was smoke transported from the Western US by the jet stream and spread as far as Boston and even Europe.
Sept. 22, 2020 • ~4 min
atmosphere pollution wildfires smoke sun fire jet-stream fire-season
New research on marmots in the US reveals how the topsy-turvy seasons are causing havoc among wildlife.
July 8, 2020 • ~6 min
climate-change seasons extreme-weather phenology north-america small-mammals
There's no scientific definition for a wave of disease – and no evidence that the original onslaught of coronavirus in the US has receded much at all.
July 6, 2020 • ~8 min
influenza infectious-diseases epidemiology covid-19 coronavirus pandemic sars-cov-2 herd-immunity epidemics 1918-flu-pandemic iran seasonal-flu waves second-wave pandemic-flu seasonality coronaviruses
Ccoronavirus has put emergency responders and resources under extreme pressure all over the world just as the hurricane season approaches.
April 30, 2020 • ~7 min
coronavirus us atlantic-hurricane-season