Earth's Seasons

Earth's seasons — winter, spring, summer and autumn(or fall) — are caused by the yearly revolution of the Earth in its orbit around the sun and the planet's tilt. When the Northern Hemisphere is pointed toward the sun, it is summer, and when it is pointed away, it is winter (and vice versa for the Southern Hemisphere). Summer and winter are heralded by their respective solstices, while spring and fall begin at an equinox, when the sun crosses Earth's equator and night day are roughly equal length. Below, our stories that relate to Earth's seasons and the ways they affect us.
Read More
Winter Forecast for US Nothing to Shiver About
2014 winter weather outlook
October 16th, 2014
Don't expect the polar vortex to pummel the eastern United States this winter.
Read More »
Hot and Getting Hotter: Heat Islands Cooking US Cities
planet, planets, round, why, sphere, spheres, spherical, bulge
August 21st, 2014
Since 1970, cities have been warming, and have been getting hotter far faster than adjacent rural areas
Read More »
Happy Summer! Surprise Snowstorm Clobbers Rockies
June 19th, 2014
A bizarre June snowstorm hit Glacier National Park in Montana and parts of Utah and Idaho this week, leaving many residents and visitors in the northern Rockies wondering what season it is.
Read More »
Pew, Pew: Bizarre Sounds from Frozen Lake Explained
coolest sound ever
October 16th, 2014
What causes the weird sounds produced by skipping rocks across a frozen lake?
Read More »
Roasting? 7 Scientific Ways to Beat the Heat
A man pours water over his head on a hot day.
July 25th, 2014
As summer heats up, you may be looking for ways to avoid the heat, beyond the common advice of drinking water and staying inside during the hottest parts of the day. Here are seven science-based tips for staying cool.
Read More »
Are We Heading for a Worrying Super El Niño?
warm weather, sunny days, el nino
May 2nd, 2014
We have only just moved into May and despite being seven months away from next summer in the southern hemisphere, climate researchers are seeing the beginnings of what could be the most powerful El Niño event since 1997/98.
Read More »
6 Trees That Are Easier to Identify in Fall
Red maple, trees, tree identification, fall colors, fall, autumn, fall leave
October 6th, 2014
Many trees put on a show in fall, with their leaves turning hues of orange, yellow, red, purple and brown. But these changing colors can also serve as a marker to help identify trees.
Read More »
Saturday Solstice Marks Official Start of Summer
Summer Beach
June 20th, 2014
The summer solstice will occur Saturday (June 21), marking the official start of summer.
Read More »
Have a Question about Your Fitness? Join Our Twitter Chat
A fit-looking woman raises her arms over her head in celebration.
May 29th, 2014
What would you like to know about health, fitness and dieting before beach season starts?
Read More »