The Descent of Philae Toward the Comet in Tweets
By THE NEW YORK TIMES
The European Space Agency’s 220-pound lander, named Philae, is marking its fall toward the comet, known as 67P/Churyumov-Gerasimenko, in Tweets.
To Land on a Comet
Comet Landing Bumpier Than First Thought
By KENNETH CHANG
European Space Agency
A two-image panorama taken by the Philae lander from the surface of Comet 67P/Churyumov-Gerasimenko.
The European Space Agency lander is sitting in a skewed position on the comet’s surface, compromising some aspects of the $1.75 billion Rosetta mission.
Graphic: Landing on a Comet, 317 Million Miles From Home
By JONATHAN CORUM
The Rosetta spacecraft’s Philae lander is attempting to land on Comet 67P/Churyumov-Gerasimenko.
Landing on a Comet, a European Space Agency Mission Aims to Unlock the Mysteries of Earth
By KENNETH CHANG
The ambitious mission succeeded, despite a potential showstopper problem, when a signal arrived at Darmstadt, Germany, just after 11 a.m. Eastern time.
Landing on a Comet: Inside Rosetta Orbiter’s Philae Landing Mission
By KENNETH CHANG
Joel W. Parker, a planetary scientist at the Southwest Research Institute, answers questions about putting a 220-pound lander on a comet.
Evolution has come up with many strategies for successful mating. For one kind of marine crustacean, that means a game of cat and mouse with mates and competitors.
Climate Accord Relies on Environmental Policies Now in Place
By HENRY FOUNTAIN and JOHN SCHWARTZ
The United States and China should both be able to meet the stated goals by aggressively pursuing policies that are largely underway, analysts said.
In Climate Deal With China, Obama May Set 2016 Theme
By CORAL DAVENPORT
The landmark agreement to cut greenhouse gas pollution is a bet by President Obama that the environment will be a winning cause for Democrats.
The Ebola Outbreak
Liberia President, Citing Ebola Gains, Ends State of Emergency
By CLAIR MacDOUGALL
President Ellen Johnson Sirleaf said she would not extend the state of emergency, which had angered critics.
Health Officials Reassess Strategy to Combat Ebola in Liberia
By HELENE COOPER and SABRINA TAVERNISE
As the rate of new infections has slowed, American and Liberian officials are debating whether to shift money that was planned for the centers into other programs to combat future outbreaks.
Second Ebola Outbreak in Mali Eclipses Early Success
By DONALD G. McNEIL Jr.
The West African nation of Mali, which just beat its first outbreak of Ebola, has confirmed a second one that is larger and more threatening, global health authorities said on Wednesday.
Inquiry Into SpaceShip Two’s Crash Says ‘Feathers’ Were Unlocked Prematurely
By MATTHEW L. WALD
The surviving pilot of the SpaceShip Two crash told investigators he did not know that the co-pilot had unlocked two movable parts at the back of the craft.
Risk Model Seen as Reducing Military Suicides
By BENEDICT CAREY
The computer model identifies a range of factors related to suicide that could allow doctors to follow high-risk soldiers closely and take preventive measures.
Colorado: Sage Grouse Is Given Protected Status
By THE ASSOCIATED PRESS
Federal officials granted protection to the Gunnison sage grouse on Wednesday, a move that could bring restrictions on oil and gas drilling and other activity to preserve the bird’s habitat in areas of Colorado and Utah.
Fearing Bombs That Can Pick Whom to Kill
By JOHN MARKOFF
Weapons that rely on artificial intelligence to decide what to target could become increasingly difficult to control, critics warn.
Science Times: Nov. 11, 2014
Béatrice de Géa for The New York Times
A double exposure of weakly electric fish with recordings of brain activity.
The body of knowledge about how the brain works is growing, but so is the list of gaps in our understanding. Larry Abbott, a former theoretical physicist, is looking for models to fill them in.
Podcast: Science Times
Larry Abbott started his career working with particle colliders, but he realized that the complex mathematics of physics came in quite handy for trying to understand the brain.
Decoding the Brain’s Math
Podcast: Science Times
A group of researchers at New York University is using sewage water to track diseases and monitor health.
Sewage Science
Podcast: Science Times
Newly available photographs and movies have made the dawn of the nuclear weapons era go viral, providing a history lesson to a new generation.
Fat Man and Little Boy Revisited Science Columns
Observatory
Signs of the Evolutionary Step From Land to Sea
By DOUGLAS QUENQUA
Ichthyosaurs, which loosely resembled dolphins, have long been an evolutionary mystery. Now, researchers say they have recovered an early Ichthyosaur fossil that may fill in the blanks.
Q&A
Hungry as a Bear
By C. CLAIBORNE RAY
Which animals are most and least efficient at digesting food?
A New Home for a Secretive Songbird
By SINDYA N. BHANOO
Swainson’s warbler — a secretive, rarely seen songbird that nests in the swamplands of the southeastern United States — may no longer be so hard to find. Researchers report that the bird has found a new safe haven.
Global Health
A Rare Form of Malaria Is Spreading in Malaysia
By DONALD G. McNEIL Jr.
In part of Borneo, a parasite called Plasmodium knowlesi causes severe malaria three times as often as Plasmodium falciparum, which has long been considered the deadliest form of the disease, new research suggests.
A Bat Signal Is Jammed
To gain an advantage when hunting, Mexican free-tailed bats emit a special call that interferes with the calls of other bats in search of food, researchers say.
Science Bookshelf
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From Opinion
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Wobbling on Climate Change
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The science of global warming is too important to trivialize.
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The Astonishing Weaponry of Dung Beetles
By DOUGLAS EMLEN
Animal arms races always unfold in the same way. But those with the biggest weapons don’t always win.
Opinion
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A weekly video series on new research discoveries from how snakes fly and why fruit flies fight to how water bounces and metal chains can flow like fountains.
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