Bats can remember sounds they haven't heard for more than 4 years

The First Weather Satellite - TIROS 1 launched 62 years ago

50 years ago, the first canopy ecologists used rock climbing gear to get into the treetops, anchoring their ropes with petons hammered into bark. Now, they worry that some destructive climbing techniques could come full circle as recreational sports climbers take to the trees.

Furthest star ever seen offers glimpse 12.8 billion years into past