NASA’s Curiosity rover has spotted carbon-containing minerals that can tell scientists more about what ancient Mars’ atmosphere may have looked like.

Sharks have ruled the Earth’s oceans for 400 million years. Recent research on fossil shark teeth has discovered an innovative method for dating ancient sediments.

While it’s too early to say whether graphene will live up to the hype, it’s now appearing in everything from motorcycle helmets to aircon units.

Blue carbon is stored in mangroves, seagrass and sediments. Discussions at the UN Ocean Decade conference reiterate the importance of preserving existing sea floor habitats, before it’s too late.

A new study shows how thawing permafrost and intensifying storms will change how water moves into and through Arctic rivers.

Hidden Peat, a new campaign from The Wildlife Trusts, encourages people to look out for peat-free alternatives and support their wider use.

Brazil’s rainforest is a massive carbon store, so its severe drought could be a tipping point for the global climate. Listen to The Conversation Weekly podcast.

Some rocks will burn, and others will melt, depending on how they were formed and what minerals they contain.

Graphene is superstrong and superconductive, and it has applications in everything from construction to electronics. But to date there have been almost no commercial uses of the material.