Science

1. Credit

2. CreditRenaud Philippe for The New York Times

3. CreditThe New York Times

4. CreditCassandra Klos for The New York Times

5. Did You Really Need to Be There to See the Eclipse?

   For much of the 20th century, Rochester, N.Y., was the "imaging capital of the world." For three and a half minutes on Monday, it was living up to its old nickname.

    By Christopher Valentine and Gideon Jacobs

   Credit

Trilobites

1. CreditNasuna Stuart-Ulin

2. CreditJorge Blanco

3. CreditAlexey Malgavko/Reuters

4. How a Snake Uses Its Sense of Smell

   These reptiles and their social networks are understudied, according to researchers applying scents to different snakes to assess their behavior.

    By Asher Elbein

   Credit

5. CreditBIAX Consult

Origins

1. CreditBiophoto Associates/Science Source

2. CreditBlue Nile Survey Project

3. CreditLouise Johns for The New York Times

4. Tras la pista de los denisovanos

   El ADN ha demostrado que esos humanos ya extintos se extendieron por todo el mundo, desde la fría Siberia hasta el Tíbet, a una gran altitud, quizá incluso en las islas del Pacífico.

    By Carl Zimmer

   CreditMaayan Harel/Universidad Hebrea en Jerusalén, vía Associated Press

5. On the Trail of the Denisovans

   DNA has shown that the extinct humans thrived around the world, from chilly Siberia to high-altitude Tibet — perhaps even in the Pacific islands.

    By Carl Zimmer

   CreditMaayan Harel/Hebrew University in Jerusalem, via Associated Press

Climate and Environment

1. CreditLudovic Marin, Nicolas Garcia and Jade Gao/Agence France-Presse — Getty Images

2. Is Online Shopping Bad for the Planet?

   In theory, getting deliveries can be more efficient than driving to the store. But you may still want to think before you add to cart.

    By Dionne Searcey

   CreditNaomi Anderson-Subryan

3. CreditThe New York Times

4. CreditKazi Salahuddin Razu/NurPhoto, via Getty Images

5. CreditJim Wilson/The New York Times