Tom Speight, showing off his gym-honed physique, looked every inch the confident pop star as the photographer snapped away.

Plants have small pores on the underside of their leaves, known as stomata. When the sun rises, these pores open and the ...

Trees may forgo photosynthesis if they can’t absorb enough water overnight, revealing how drought reshapes their daily ...

Plants have small pores on the underside of their leaves, known as stomata. When the sun rises, these pores open and the plants absorb carbon dioxide ...

Test yourself on this article or click here to choose other subjects from the Self-assessment archive. A stoma is an opening in the abdominal wall that is used to remove body waste. There are many ...

Plants have small pores on the underside of their leaves, known as stomata. When the sun rises, these pores open and the plants absorb carbon dioxide (CO2) from the atmosphere, which they need ...

A two-lined pause icon for stopping interactions. A opening quote mark. A closing quote mark. An icon of an arrow. An icon of a paper folder. An icon of an exclamation mark on a circular background.