From a Tortoise to a Turtle: A Letter Across the Warming World

Dear Cousin Turtle,

I hope this letter somehow reaches you across the rivers, seas, and currents that separate our homes. I write slowly—as tortoises do—but with urgency in my heart. The world we once knew, the one our ancestors walked and swam through for millions of years, is changing faster than our shells can endure.

You live in the oceans. I live on land. Yet the heat rising in the air and the water touches both of us.

I remember stories passed down through generations. Our family, the ancient shelled wanderers of Earth, has survived meteor strikes, ice ages, and the shifting of continents. Fossils say our lineage goes back more than 220 million years, long before humans walked the planet. We were once symbols of patience and resilience.

But patience alone cannot cool a planet.

Here on land, the sun burns hotter each year. The grasslands that once fed us are drying. In many places droughts stretch longer and the plants we depend on vanish before the rains return. Scientists say that since the late 1800s, the planet has warmed by about 1.1°C, and most of it has happened in just the last few decades. To humans it may seem small. To slow creatures like us, it is enormous.

I worry about you even more.

Your children begin life beneath warm sand. For sea turtles, temperature decides whether eggs become sons or daughters. Warmer sand means more females. Much warmer sand means the eggs may not hatch at all. Researchers studying nesting beaches have found that in some regions over 90% of hatchlings are now female because the sand has become too hot. A species cannot survive long when balance disappears.

And the oceans you swim through—once endless blue highways—are changing too. The water is absorbing heat and carbon from the atmosphere. The sea is now about 30% more acidic than it was before industrial times, weakening coral reefs that many marine creatures rely on. Coral bleaching events are happening more often, turning vibrant underwater cities into ghostly white skeletons.

Then there is the rising sea itself. Global sea level has already risen more than 20 centimeters since 1900, and it is rising faster each decade. For you, this means nesting beaches disappearing. A storm surge that once flooded sand for a day now washes entire nesting grounds away.

For me, it means something different but equally frightening. Changing climates are shifting ecosystems. Forests become scrublands. Grasslands become deserts. In places where tortoises once roamed freely, extreme heat waves are becoming deadly. Our bodies are built to survive slowly, but not to outrun fire, drought, and expanding cities.

Humans call this the climate crisis.

I often watch them from afar. Some seem unaware, rushing through their lives. Others are trying—planting trees, protecting coastlines, creating reserves. I want to believe their better instincts will win.

Because if they do not act quickly, many of our relatives may disappear. Already, conservation groups estimate that more than half of the world’s tortoise and turtle species are threatened with extinction due to habitat loss, climate change, and human activity.

Imagine that, dear cousin: creatures who survived the age of dinosaurs struggling to survive the age of air conditioning.

But I still hold hope.

I see humans protecting nesting beaches so your eggs can hatch safely. I see scientists relocating nests to cooler sand. I hear of new marine protected areas where fishing is limited so your ocean paths remain open. On land, some people are restoring grasslands and protecting migration corridors so tortoises can move as climates shift.

Perhaps the same species that changed the planet can also help heal it.

If they reduce the smoke that warms the sky…
If they protect forests and oceans…
If they remember that this Earth is not only theirs…

Then maybe, centuries from now, a young tortoise will still crawl across sunlit land, and a young turtle will still swim through coral gardens beneath the sea.

Until then, I will keep walking slowly forward.

You keep swimming.

And together, in our quiet ways, we will remind the world that even the oldest lives on Earth deserve a future.

With patience and hope,
Your cousin,
The Tortoise