After similar announcements by France, Britain and Canada, Australia said it would act at the United Nations General Assembly session next month.

© Mick Tsikas/Australian Associated Press, via Reuters

Very few people know what it’s like to recover, physically and emotionally, from a shark bite. But some of the ones who do are ready to help.

© Mridula Amin for The New York Times

Many of the world’s biggest earthquakes, volcanic eruptions and tsunamis occur along a chain of seismologically active regions that encircle the Pacific Ocean.

© NASA