WWF urges end to deadlock on new Antarctic reserves

Members of a multinational group on Antarctic conservation must end a years-long deadlock and agree on new marine reserves in the region as sea-ice shrinks to record lows, the WWF urged Wednesday.

High heat, ethylene levels independently halt tomato fruit set

Ethylene is an essential plant hormone at low concentrations. Concentrations in the field rarely exceed 5 nmol⋅mol−1 (0.005 ppm), but it can accumulate as a gas in closed, indoor environments. These elevated levels can ...

The fall equinox is here. What does that mean?

Fall is in the air—officially. The equinox arrives on Saturday, marking the start of the fall season for the Northern Hemisphere. But what does that actually mean? Here's what to know about how we split up the year using ...

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