Science Capsules

Ice sheets, ocean currents, and cloud physics could shift Earth's climate faster than the smooth curves in most projections. The findings diverge on how close those tipping points are, how much to trust the models that predict them, and how finance and policy should price risks that arrive suddenly rather than gradually. What you take from them shapes how urgent, and how hedged, you think climate decisions need to be.

Most plastic tossed in the recycling bin never becomes anything new, and the reasons are contested. These reasons range from misleading resin codes and the false promise of chemical recycling to the systemic changes and proven programs that do work. You can decide which fixes would genuinely improve where your plastic ends up.

Nuclear safety gets argued from very different starting points. These views cover lessons drawn from Chernobyl and Fukushima to harden emergency systems, the case that nuclear is safer than many economic and environmental threats we already accept, and hard questions about how trustworthy safety assurances really are. You can weigh them and decide what nuclear safety means to you.