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Mars seen by the Viking oriter. Image via NASA/JPL/USGS

Landing on Mars is hard

Mars’ atmospheric pressure is less than 1% that of Earth, so spacecraft come down hard. Europe has been trying for a Mars’ soft landing since 2003. How they plan to succeed.

Micro changes have macro results. Image via Darryl Leja, National Human Genome Research Institute, National Institutes of Health

The circadian rhythm of our microbes

Like most life on Earth, our gut microbes have their own circadian rhythm. Disrupting that daily routine can be bad – and keeping it in balance can be good – for whole body.

Artist's impression of Hadean Earth. Image via The Hadean Era

What’s the hottest Earth has ever been?

Earth’s hottest periods occurred before humans existed. Those ancient climates would have been like nothing our species has ever seen.


Signs of climate change at Arctic tree line

Near the Arctic Circle, in northern Alaska, is where forests give way to tundra. Researchers are looking at how the warming climate might affect the ecology of this northern boundary.

Image via Norio NAKAYAMA/Flickr

Climate change affecting all life on Earth

A new analysis of hundreds of studies says that almost every aspect of life on Earth has been affected by climate change … and that’s not good news for humans.


What happens if the sun disappears?

Some things that would happen here on Earth if our giant source of heat and light were to vanish from the sky, and how long it would take.

A fog blanketed London in December 1952, killing as many as 12,000 people and puzzling researchers for decades. Image via Texas A&M University.

Team solves mystery of London killer fog

A fog blanketed London in December 1952, killing as many as 12,000 people. Its exact cause and nature puzzled researchers for decades … until now.

Early sunrise by Flickr user Raffee

2016 likely hottest year on record

It’ll be the hottest year on record unless the final weeks of 2016 are the coldest of the 21st century so far, according to the World Meteorological Organization.

Image via GreatAmericanEclipse.com

Best places to watch 2017 eclipse

Where’s the best place to see the August 21, 2017 eclipse? Here are 10 great viewing spots to gaze upon nature’s grandest spectacle, weather permitting.

Spring forward, fall back … why? Image via Shutterstock.com

Daylight saving time worth the trouble?

Who benefits from the time change? A scientist on why DST is more burden than boon.