The arrival of a baby swell shark at an aquarium in Louisiana has caused a wave of excitement, after the egg hatched despite the fact that no male sharks appear to have been involved. Shark pup ...

In other animal news, scientists say they are awestruck over the unexpected arrival of a baby swell shark at Louisiana’s Shreveport Aquarium because no male sharks have visited the tank in years.

The challenge of unearthing lost things and solving inscrutable puzzles is a driving force in the world of science. Such breakthroughs rarely happen in the derring-do fashion of the “Indiana Jones” ...