References

References Rowing machines and treadmills do not challenge your cardiovascular system in the same way, so what is the science behind it?

REFERENCE Equinoxes occur twice a year, with night and day being almost the exact same length all across the world. The next equinox is the March vernal equinox, beginning on March 20, 2025 in North America.

We're sharing our best tips on how to photograph the moon and with the total lunar eclipse on March 13-14 — discover the right gear, settings and composition techniques to make the most of the event.

Discover interesting facts about how Earth formed, what it's made of and more.

Explore the wonders of the night sky with our guide to the best celestial sights you can observe with binoculars between February and April 2025.

Discover interesting facts about snakes, from how they hunt and eat, to why they don't have legs.

Is it ever too late in the season to get a flu shot? Here's what experts have to say.

Discover interesting facts about volcanoes, including why and where they form and history's deadliest eruption.

Reference We take a closer look to see if using air purifiers helps with asthma.

REFERENCE Air purifiers can improve air quality, but do these devices help relieve allergies?