Palau's idyllic waters hide an experiment that scientists hope will save the world's reefs from climate change-induced collapse.

At an outer reef, ceramic cribs are holding thousands of baby corals growing underwater.

They're "super corals", selectively bred to survive hotter ocean temperatures.

And they're providing hope in global efforts to stop marine heatwaves from wiping out reefs.

Like humans, corals are genetically diverse and some have stronger immune systems, giving them a natural advantage in surviving bleaching events.

Palau's corals appear to have those genetic gifts, having emerged relatively unscathed from marine heatwaves that have devastated reefs worldwide.

So researchers there are selectively breeding heat tolerant corals from different species and multiple generati

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