Surprising Water Found on Inner Solar System Objects
December 13, 2018
Recently-visited objects in the inner solar system show evidence of water ice or volatile materials.
Natural Sources of Methane Surprise Climate Scientists
November 28, 2018
Methane is 30 times more potent than carbon dioxide as a greenhouse gas. Look where it comes from.
NASA Verdict: Most Exoplanets Are Not Habitable
October 23, 2018
Superflares from the majority of stars would likely sterilize any planet in its "habitable zone."
Latest Evidence that Saturn and Its Rings Are Young
October 8, 2018
A new set of post-Cassini papers has to deal with observational facts: Saturn's rings cannot last billions of years.
Pluto Rivals Earth in Geological Complexity
September 14, 2018
Call it what you will, Pluto is a planet of surprises. Its active geology is second only to Earth's, say two planetary scientists.
Mars Is Losing Its Atmosphere Fast
July 20, 2018
Measurements of Martian atmospheric loss rates imply incredible changes over the assumed billions of years of Mars' history.
Why Milankovitch Cycle Theory Is Like Astrology
June 22, 2018
Sometimes a hunch proves to be unworkable. The Milankovitch Cycle theory has too many complications. It’s time to give it up. In the 1920s, Milutin Milankovitch, a Serbian astronomer, mathematician and popularizer of science, had a bright idea. Knowing that certain orbital cycles drift over time, he wondered if they could influence the earth’s climate. […]
Bugs Ride on the Wings of the Wind
June 19, 2018
Small animals can take advantage of wind to go long distances in remarkable ways.
Climate Science Underestimates Natural Sources of Warming
June 18, 2018
Scientists discover two more potent sources of greenhouse gases, both of which have nothing to do with human activity.
Van Allen Belts Protect Earth from Solar Wind
June 11, 2018
Geophysicists are still puzzling over how the earth's magnetic field and Van Allen radiation belts protect the surface from deadly particles in the solar wind.
Our Solar System Appears Odd to Astronomers *
January 29, 2018
Our solar system is an oddball, conclude astronomers who looked at hundreds of planetary systems around other stars. *Audio version available.
Lightning Can Produce Carbon-14
November 29, 2017
In a surprise announcement, Japanese researchers found that lightning bolts can be powerful enough to cause nuclear fission, leading to new isotopes— including carbon-14.
Facing Reality About Life on Other Planets: Moon, Atmosphere, and Mass
August 29, 2017
This is part 3 of Dr Henry Richter's discussion on the requirements for life to exist on a planet elsewhere in the universe.
Habitability Requires the Right Kind of Star
August 19, 2017
This is a continuation of my discussion on the requirements to allow life to exist on a planet elsewhere in the universe.
Life Helps Protect the Planet
July 1, 2017
When humans make a mess of things, our fellow organisms try to help. That's no excuse for our failures to be good stewards.