Letters to the Editor
- Cosmology
Readers wonder about the universe’s expansion and more
Readers had questions about the universe's accelerating expansion, a hidden void in the Great Pyramid of Giza and what happens to human waste in space.
- Life
Readers wrangle with definition of ‘species’
Readers asked about the definition of "species," a new atomic clock and how a neutron star collision produces heavy elements.
- Science & Society
These are the most-read Science News stories of 2017
From Cassini and eclipses to ladybugs and dolphins, Science News online readers had a wide variety of favorite stories on our website.
- Life
Readers debate ethics of resurrecting extinct species
Readers raised questions about using gene editing tools to bring species back from the dead.
- Science & Society
Readers inspired by SN 10 scientists’ research
Readers wanted to know more about the scientists' research who were profiled in "The SN 10: Scientists to watch."
- Health & Medicine
Readers intrigued by ancient animals’ bones
Readers had questions about gut bacteria, woolly rhino ribs and ancient horses hooves.
- Particle Physics
Readers question photons colliding, black sea snakes and more
Readers had questions about brain flexibility, black sea snakes and photon collisions.
- Astronomy
Readers ponder mini-spacecraft and Canaanites’ genomes
Readers have questions about miniature spacecraft project and Canaanite genealogy.
- Planetary Science
Readers were curious about rogue planets, exomoons and more
Readers had questions about rogue planets, human arrival in Australia, and exomoons.
- Astronomy
Inquiries about the moon’s twilight zone, and more reader feedback
Readers had questions about the moon's tidal locking, quantum communication, microneedles and more.
- Animals
Readers fascinated by critters’ strange biology
Readers responded to fish lips, monkey brains, sunless tanner and more.
- Anthropology
Readers question hominid family tree
Readers sent feedback on hominid origins, fast cameras, slimy sea creatures and more.
