A breakthrough method for analysing the DNA of centuries-old plant samples has given scientists an edge in combating the spread of invasive plants.

Ragweed will reconvene to play their first full concerts together in 15 years — and their first stadium shows ever — April 10 ...

The worst months for allergies in Phoenix are typically March through May. Common allergy symptoms include sneezing, runny nose, itchy eyes and congestion. Severe cases can hurt your sleep, work ...

In the spring, heavily pollinating trees include ash, mesquite, mulberry, cottonwood, oak and olive along with ragweed and various grasses. In the summer, some lingering grass and weed allergens ...

Things are expected be roughest for the weed-allergy sufferers in the southern ... One study looked at the impact of increased carbon dioxide on ragweed plants. It found that with more carbon ...

Things are expected be roughest for the weed-allergy sufferers in the southern ... One study looked at the impact of increased carbon dioxide on ragweed plants. It found that with more carbon ...

Things are expected be roughest for the weed-allergy sufferers in the southern ... One study looked at the impact of increased carbon dioxide on ragweed plants. It found that with more carbon ...