A Deep Math Dive into Why Some Infinities Are Bigger Than Others

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August 16, 2021

Mathematics A Deep Math Dive into Why Some Infinities Are Bigger Than Others The size of certain infinite sets has been a mystery. Now, it turns out, each one is different than the next, and they can all be ordered by size By Martin Goldstern,Jakob Kellner

Public Health England's Rush to Reopen Is a Cautionary Tale for the U.S. Stripping back nearly all public health restrictions comes as the virus still poses a threat By Luke Taylor

Climate Change A Key Step for Limiting the Global Temperature Rise to 1.5 Degrees Celsius The International Energy Agency needs to make that goal the centerpiece of its World Energy Outlook By Rebecca M. Peters

Sponsor Content Provided by Science Signaling/ AAAS Publish Your Paper in Science Signaling Do your studies aim to increase our understanding of the basic mechanisms that underlie physiology and disease across all organisms? If so, we would like to see your research published on the pages of Science Signaling. Submit Today! Learn more: ScienceSignaling.org

Planetary Science Brown Dwarfs Could Reveal Secrets of Planet and Star Formation They’re not quite stars and not quite planets but can help us understand both By Katelyn Allers

Natural Disasters New Wildfire Tactic: Help People Flee California firefighters are updating evacuation maps and keeping routes free By Anne C. Mulkern,E&E News

Microbiology Watch Countless Small Worlds Pulse: From Liquid Crystals to Sea Cucumbers Nikon’s Small World in Motion video competition is filled with moving delights. By Meghan McDonough

Behavior What God, Quantum Mechanics and Consciousness Have in Common Theories that try to explain these big metaphysical mysteries fall short, making agnosticism the only sensible stance By John Horgan

Ethics Science Must Be for Everyone Racism and sexism are obstacles to making the scientific enterprise worthy of its public funding By Maureen Kearney,Gilda Barabino,Joseph Graves,Shirley M. Malcom

Extraterrestrial Life When Will We Hear from Extraterrestrials? Project Galileo could make that happen sooner rather than later By Avi Loeb

Ecology Suspect List Narrows in Mysterious Bird Die-Off Here’s how researchers are zeroing in on the culprit By Maddie Bender

Medicine New DNA Blood Test Could Pinpoint Cancer's Source in the Body The assay could also help evaluate organ transplants and fetal genetic disorders By Anna Goshua

Behavior The Art of Pondering Earth's Distant Future Stretching the mind across time can help us become more responsible planetary stewards and foster empathy across generations By Vincent Ialenti

Behavior The FDA Shouldn't Support a Ban on Kratom The herbal supplement can be abused, but given the explosion in opioid deaths, eliminating this safer substitute will almost certainly lead to more deaths By Maia Szalavitz

Policy In Case You Missed It Top news from around the world By Maddie Bender

FROM THE STORE Special Editions Volume 30, Issue 3s

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FROM THE ARCHIVE The Tragedy of Infinite Tic-Tac-Toe How many X’s Can You Fit in a Plane? By Evelyn Lamb | March 2019

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