Singita Milele, in the Grumeti Game Reserve bordering the Serengeti, is the most hotly anticipated safari opening recent memory—and it doesn’t disappoint.

For more than a century, physicists have suspected that the familiar three dimensions of space might be only a small slice of ...

An asteroid named YR4 is on a potential collision course with the moon, with NASA estimating a 4% chance of impact in 2032.